Is there a way to add a default where statement for a SubPanelTopSelectButton?

Say for a Users Subpanel, any search returns all but current user (AND users.id != $current_user->id)

layout_defs file to add subpanel:
PHP Code:
        'users' => array(
            
'order' => 40,
            
'module' => 'Users',
            
'subpanel_name' => 'ForUsers',
            
'get_subpanel_data' => 'users',
            
'add_subpanel_data' => 'access_id',
            
'title_key' => 'LBL_USERS_ACCESS_SUBPANEL_TITLE',
            
'top_buttons' => array(
                array(
'widget_class' => 'SubPanelTopSelectButton''mode'=>'MultiSelect')
            ), 

subpanel file used:


PHP Code:

$subpanel_layout 
= array(
    
'top_buttons' => array(
        array(
'widget_class' => 'SubPanelTopSelectButton''popup_module' => 'Users'),
    ),

    
'where' => '',
    
'default_order_by' => '',

.... 

I've tried this in the subpanel file:


PHP Code:
global $current_user;

$subpanel_layout = array(
    
'top_buttons' => array(
        array(
'widget_class' => 'SubPanelTopSelectButton''popup_module' => 'Users'),
    ),

    
'where' => "users.id != '" $current_user->id "'",
    
'default_order_by' => '',

.... 
But it still returns the current user in results.


Thanks,
Rey