[deathemperor]

use this condition: <if condition="is_member_of($thread, 6)"> code goes here </if>

6 is the number of the usergroup. I don't know if this works, just a logical thought.

this is the line you must edit:

			<if condition="$show['guestuser']">
				$thread[postusername]
			<else />
				<span style="cursor:pointer" onclick="window.open('member.php?$session[sessionurl]u=$thread[postuserid]')">$thread[postusername]</span>
			</if>