Hello Keith,

Thank you for posting. Try the following code it prevents student type user from comment and replying on other user’s activity.

/**
 * Check weather user is restricted from commenting.
 *
 * @param int $user_id User id.
 *
 * @return bool
 */
function buddydev_is_restricted_commenter( $user_id ) {
	// Never restrict super admin from commenting.
	if ( is_super_admin( $user_id ) ) {
		return false;
	}

	return bp_has_member_type( get_current_user_id(), 'student' );
}

/**
 * Check user can comment or not.
 *
 * @param bool $can Bool.
 *
 * @return bool
 */
function buddydev_user_can_comment( $can ) {
	$activity = new BP_Activity_Activity( bp_get_activity_id() );

	$user_id = get_current_user_id();

	// Do not restrict for its own activity.
	if ( $activity->user_id == $user_id ) {
		return $can;
	}

	if ( buddydev_is_restricted_commenter( $user_id ) ) {
		$can = false;
	}

	return $can;
}
add_filter( 'bp_activity_can_comment', 'buddydev_user_can_comment' );
add_filter( 'bp_activity_can_comment_reply', 'buddydev_user_can_comment' );

Please do let me know if it works or not.

Regards
Ravi

Hello Keith,

Thank you for the acknowledgement.

Regards
Ravi