Hi Mike,
Thank you for the question.

The data is stored in user meta as serialized array(field id=> viability level). I am unable to suggest a nice way to query it.
Please take a look at the meta key ‘bp_xprofile_visibility_levels’ in user meta.

Regards
Brajesh

Hi Dianne,
Thank you for your patience.

Please remove the old code and use the following.

/**
 * Returns a list of user links sorted alphabetically.
 *
 * @param array $group_users user ids.
 *
 * @return string
 */
function bp_custom_get_alpha_sorted_user_links( $group_users ) {

	if ( empty( $group_users ) ) {
		return '';
	}

	$group_user_ids = wp_list_pluck( $group_users, 'user_id' );

	$users = get_users(
		array(
			'include' => $group_user_ids,
			'orderby' => 'display_name',
			'order'   => 'ASC',
		)
	);

	$markup = '';

	foreach ( $users as $user ) {
		$markup .= sprintf( '<a href="%1$s" class="custom-user-group-user-link">%2$s</a>', esc_url( bp_core_get_user_domain( $user->ID ) ), bp_core_get_user_displayname( $user->ID ) );
	}

	return $markup;
}

function user_world_memberships( $atts, $content = '' ) {

	$atts = shortcode_atts(
		array(
			'user_id'            => bp_displayed_user_id(),
			'type'               => 'alphabetical',
			'order'              => 'ASC',
			'page'               => 1,
			'per_page'           => - 1,
			'group_type'         => '',
			'group_type__in'     => '',
			'group_type__not_in' => '',
			'group_role'         => '', // 'admin' , 'mod', 'member'.
			'list_admins'        => 0,
		),
		$atts,
		'member_worlds'
	);

	$list_admins = (bool) $atts['list_admins'];
	$user_groups = array();

	if ( 'admin' === $atts['group_role'] ) {
		$user_groups = bp_get_user_groups(
			$atts['user_id'],
			array(
				'is_admin' => true,
				'per_page' => $atts['per_page'],
				'page'     => $atts['page'],
			)
		);
	} elseif ( 'mod' === $atts['group_role'] ) {
		$user_groups = bp_get_user_groups(
			$atts['user_id'],
			array(
				'is_mod'   => true,
				'per_page' => $atts['per_page'],
				'page'     => $atts['page'],
			)
		);
	}

	if ( in_array( $atts['group_role'], array( 'admin', 'mod' ), true ) ) {
		if ( empty( $user_groups ) ) {
			return '';
		}

		$group_ids       = array_keys( $user_groups );
		$atts['include'] = $group_ids;
		unset( $atts['user_id'] );
	}

	$groups = groups_get_groups( $atts );

	$groups = $groups['groups'];
	if ( empty( $groups ) ) {
		return '';
	}

	$list = '';
	foreach ( $groups as $group ) {
		$admin_markup = '';
		if ( $list_admins ) {
			$admin_markup = bp_custom_get_alpha_sorted_user_links( groups_get_group_admins( $group->id ) );
		}
		$list .= sprintf( '<li><a title="View %1$s" href="%2$s" class="custom-user-group-group-link">%3$s</a>%4$s</li>', esc_attr( $group->name ), esc_url( bp_get_group_permalink( $group ) ), esc_html( $group->name ), $admin_markup );
	}

	if ( ! empty( $list ) ) {
		$list = "<ul class='custom-user-group-list'>{$list}</ul>";
	}

	return $list;
}

add_shortcode('member_worlds', 'user_world_memberships');

You can pass group_role and list_admins options to list specific groups as in your initial requirement. It should handle most of the earlier use case.

Regards
Brajesh

Hi Russel,
Thank you.
The filter is correct though we made a typo in the plugin while adding this filter.

I will suggest going bp-custom.php route to avoid any surprise change in future.

Regards
Brajesh

Hi Nik,
Thank you for the detailed reporting of the issue.

Please allow me to check this today and get back to you in next 24 hours.

Regards
Brajesh