2 ways:
1- Enter a userstatus for that usergroup in Admin CP
2- Requires a hack:
edit function.php find:
PHP Code:
$post[posttime]=vbdate($timeformat,$post[dateline]);
after that add:
PHP Code:
if ($post[usergroupid]==6) {$post[usergroupname]='<img src=images/adminav.gif>';}
elseif ($post[usergroupid]==5) {$post[usergroupname]='<img src=images/modav.gif>';}
(You have to add all usergroups in this format)
Then add $post[usergroupname] into postbit template