bp_member_type_query( $query )

function bp_member_type_query( $query ) {
	global $wpdb;

	$cookie_scope = filter_input( INPUT_COOKIE, 'bp-members-scope', FILTER_VALIDATE_INT );
	//$post_scope   = filter_input( INPUT_POST, 'scope', FILTER_VALIDATE_INT );
	$post_scope   = isset( $_POST['scope'] )? intval( $_POST['scope'] ) : null;

	if ( $post_scope ) {
		$type_id = $post_scope;
	} elseif ( $cookie_scope ) {
		$type_id = $cookie_scope;
	}

	if ( isset( $type_id ) ) {

		//Alter SELECT with INNER JOIN
		$query->uid_clauses['select'] .= " INNER JOIN {$wpdb->prefix}term_relationships r ON u.{$query->uid_name} = r.object_id ";

		//Alter WHERE clause
		$query_where_glue            = empty( $query->uid_clauses['where'] ) ? ' WHERE ' : ' AND ';
		$query->uid_clauses['where'] .= $query_where_glue . "r.term_taxonomy_id = {$type_id} ";
	}
}