Hi Tiziano,
you have the

<?php

tag missing in the bp-custom.php

It should be the first thing.

Hi Tom,
You may put thhis code in your bp-custom.php

/**
 * 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' );

It will redirect logged in user to previous page if they are not member of the group or is not allowed by member type.

Hope that helps.

Hi Carsten,
Thank you for posting.

At the moment there is no standard way to know a user’s gender and that’s why there are no specified ways.

For a developer, It is easy to accomplish.

If I had to do something for this, I will create member types for gender and use that to filter the things.

How are you using gender on your site?

Hi Krista,
Thank you.
1. I have marked your reply as private. Please never share any login detaiils in public. Also, I will suggest immediately changing the password. In future, Please use the “Set as private reply” checkbox below the form to send any credentials. Please do share the password after the changing.

2. I have checked on the site and the registration is disabled. Should I enable and then check it?

3. The plugin restricts registration. It means any user with an email from some other site(not specified in the list) will not be able to register. It does not restrict login for your existing user.

If you allow me to enable the registration, I can quickly check why It is not restricting.

Thank you
Brajesh