bp_ps_filter_members( $qs,  $object )

 function bp_ps_filter_members ($qs, $object)
{
	if (!in_array ($object, array ('members', 'group_members')))  return $qs;

	$request = bp_ps_get_request ('search');
	if (empty ($request))  return $qs;

	$results = bp_ps_search ($request);
	if ($results['validated'])
	{
		$args = wp_parse_args ($qs);
		$users = $results['users'];

		if (isset ($args['include']))
		{
			$included = explode (',', $args['include']);
			$users = array_intersect ($users, $included);
			if (count ($users) == 0)  $users = array (0);
		}

		$users = apply_filters ('bp_ps_search_results', $users);
		$args['include'] = implode (',', $users);
		$qs = build_query ($args);
	}

	return $qs;
}