This is very similar to what I am trying to achieve. I too have the member type pro and have tried using pp capabilities with it but it hasn’t done what I hope to achieve – it hasn’t done anything basically.

Here is what I was hoping to accomplish, I hope I haven’t explained it in an over complicated way, I have made a diagram (see image) to help explain.

diagram > https://imgur.com/a/AyVzZsP

I have 2 types of user, fans and artists. There are more ‘kinds’ of artists than fans. Let’s call them:

Member Type A (fan)
Member Type B (artist kind 1)
Member Type C (artist kind 2)
Member Type D (artist kind 3)
Member Type E (artist kind 4)
etc

I have mapped all above to the same named user roles:

Member Type A –> User Role A
Member Type B –> User Role B
Member Type C –> User Role C
Member Type D –> User Role D
Member Type E –> User Role E
etc

Each different member type has joined their own (Main) group via regitration and called the groups the same as the user roles and member types:

Member Type A –> User Role A –> Group A
Member Type B –> User Role B –> Group B
Member Type C –> User Role C –> Group C
Member Type D –> User Role D –> Group D
Member Type E –> User Role E –> Group E
etc

I am trying to give, artists more group permissions over fans:

Member Type A

– Can view ALL groups, like and comment posts etc inc groups B,C,D,E.
– Can create their own aditional groups and join each others (Member Type A) groups.
– Can NOT join artist groups B,C,D,E or newly created artist groups by members B,C,D,E.

Member Types B,C,D,E

– Can view ALL groups, like and comment posts etc inc groups A, B,C,D,E.
– Can create their own aditional groups and join each others.
– CAN join groups A, B,C,D,E or newly created groups by members A, B,C,D,E.

In short:

Member Type A can ONLY join Member Type A groups BUT is allowed to view/particiapate in Member Type B,C,D,E groups – like, comment etc

Member Type B can join and participate in ALL groups by ALL member types.

Brajesh, the code (see below) you provided to someone previously for a similar request is almost there. Any suggestions would be appreciated.

Apologies for the long message 🙂

Regards,
A

/**
 * Restrict user from accesisng groups of which he/she is not a member and it's not allowed as part of their member type.
 */
function buddydev_restrict_group_access_based_on_member_type() {

	if ( ! is_user_logged_in() || ! bp_is_group() || is_super_admin() ) {
		return;// it's not group or the user is not logged in, do not restrict.
	}

	$group_id = groups_get_current_group()->id;
	$user_id  = bp_loggedin_user_id();

	// user's own group, do not restrict.
	if ( groups_is_user_member( $user_id, $group_id ) ) {
		return;
	}

	// Member types pro is not active, return.
	if ( ! function_exists( 'bpmtp_member_types_pro' ) ) {
		return;
	}

	// Get all member types for user, user may have multiple member type.
	$member_types = bp_get_member_type( $user_id, false );

	if ( empty( $member_types ) ) {
	    return ;
		// what should we do? the user does not have any member type.
	}

	// let us build a list of group ids allowed with these member types.
	$group_ids = array();

	$active_types = bpmtp_get_active_member_type_entries();

	foreach ( $member_types as $member_type ) {
		// not valid.
	    if ( empty( $member_type ) || empty( $active_types[ $member_type ] ) ) {
			continue;
		}

		$mt_object            = $active_types[ $member_type ];
		$associate_groups_ids = get_post_meta( $mt_object->post_id, '_bp_member_type_groups', true );
	    // merge.
		if ( ! empty( $associate_groups_ids ) ) {
			$group_ids = array_merge( $group_ids, $associate_groups_ids );
		}
	}

	if ( ! empty( $group_ids ) && in_array( $group_id, $group_ids ) ) {
		return;// this group is associated with the member types the user has, so do not restrict.
	}

	// Restrict if we are here,
	$referrer = wp_get_referer();
	$referrer = $referrer ? $referrer : site_url( '/' );
	// add notice.
	bp_core_add_message( 'Access restricted', 'error' );
	bp_core_redirect( $referrer );
}

add_action( 'bp_template_redirect', 'buddydev_restrict_group_access_based_on_member_type' );