List organic group members from the current user group on his profile page
I forgot to answer you last time.! Sorry. You said your were happy with some code so here it is.

Step 1: The custom module.
    

function CUSTOM_MODULE_views_pre_view(&amp;$view, &amp;$display_id, &amp;$args){ 
// Select our view
    if($view-&gt;name == 'VIEW_NAME' and $display_id == 'DISPLAY_NAME') {
    // Get User ID from url
        $view_user = user_load(arg(1));
        $user_groups = array();
        // Get Group IDs
            $items = field_get_items('user', $view_user, 'og_user_node');
                foreach($items as $item) {
                    $user_groups[] = $item['target_id'];
                 }
    // Join like 4+78+345 for Views
        $user_groups_args = implode("+", $user_groups);
    // Send IDs to view
        $args[0] = $user_groups_args;   
    }
}


Create a module and change what's in caps. Be aware that that module doesn't do any checking.. Only use it for user/* or node/* etc. where the second argument is an integer.

Step 2: The View


In your View, add the OG membership: Group ID contextual filter
(make sure it's first in the list).  
Under its settings under More, check Allow multiple values.   
Because some users may be in more than one group, go to Query settings under Other and check Distinct.


That should be it.