[fel64]

Yup! Find this (or similar) codeblock in your theme’s front-page.php.

<tr<?php topic_class(); ?>>

<td><a href="<?php topic_link(); ?>"><?php topic_title(); ?></a></td>

<td class="num"><?php topic_posts(); ?></td>

<td class="num"><?php topic_last_poster(); ?></td>

<td class="num"><small><?php topic_time(); ?></small></td>

</tr>

Around it put

<?php if( $topic->forum_id != 666 ) { ?>

... that code block ...

<?php } ?>

You will probably want to change 666 to whatever forum id you actually want to exclude. You can put any conditional logic you like inside those if( … ) brackets, so for example to filter for two forums you would put if( $topic->forum_id != 666 && $topic->forum_id != 999 ). Hope that helps.