[Freesteyelz]

Try something like this:

<if condition="in_array($forumid, array(x, y, z))">
<table align="center" border="0" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" class="tborder" width="100%">
<tr>

<td class="tcat"><span class="smallfont"><b><center>Thread Informations</center></b></span></td></tr>

<tr valign="middle"><td class="alt1">
<br />
<center><h3>$thread[title]</h3>
<h4>$vbphrase[views] : $thread[views]</h2>
<b>$vbphrase[replies] : $thread[replycount]</b><br /><br />
<b>Users Viewing This Thread : $activeusers</b></center>
</td>
</tr>
</table>
<br />
</if>

I placed an "array" in case you wanted to add more forums. Where "x", "y" and "z" just replace them with the forumids. See if that works.