[Dismounted]

It's better to just combine the two (fractionally less processing). Also, you just specify the variable which holds the usergroup ID.

<if condition="is_member_of($bbuserinfo, 6) AND $show['activeusers']">
<!-- currently active users -->
	<br />
	<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
	<tr>
		<td class="tcat" colspan="2">
			<phrase 1="$totalonline" 2="$numberregistered" 3="$numberguest">$vbphrase[users_viewing_this_thread_x_y_z]</phrase>
		</td>
	</tr>
	<tr>
		<td class="alt1" colspan="2">
			<span class="smallfont">$activeusers</span>
		</td>
	</tr>
	</table>
<!-- end currently active users -->
</if>