[Kayen]

This is one method, there are other methods.

$Group_ID = $client->GetGroup()->GetID();
		
my @clientlist = $entity_list->GetClientList();
	
foreach $cur (@clientlist) 
{
	if ($cur) 
	{
               if ($Group_ID)
			{
				if ($cur->GetGroup())
				{
					$Client_GroupID = $cur->GetGroup()->GetID();
                                       {
                                        Shout("We are in the same group");
					}
				}
}}}}