[noppid]

In the showthread_postbit_create hook put the code.

PHP Code:

$is_admin = false;
$is_mod = false;
if( is_member_of($post,6) ) $is_admin = true;
if( is_member_of($post,7) ) $is_mod = true; 


In the postbit template put.

PHP Code:

<if condition="$is_admin"> 
CHANGE XX TO ADMIN USER GROUP
</if>
 <if condition="$is_mod"> 
CHANGE X TO MODERATOR USER GROUP
</if> 


This is not tested, but the first post was wrong completely.