[blind-eddie]

In your footer template,

Find:

				<if condition="$vboptions['archiveenabled']"><a href="archive/index.php">$vbphrase[archive]</a> -</if>

Add above:

<if condition="is_member_of($bbuserinfo, 1,2,3,4,5,6,7)"><!-- Remove or add Usergroup ID's here -->

Edit this to only show link in footer to the usergroups you want to see the link.

Find:

				$template_hook[footer_links]

Add above:

</if>

Click save.

As Boofo mentioned above, those that know the direct URL can still get to it & view it, but they can only view the forums you gave them permisson to view in Forum Manager. Remember, they do not see what you see.