restricting a page to certain usergroups

[Opserty]

There is PHP code which you can use in a Plugin: https://vborg.vbsupport.ru/showthread.php?t=175099#2

You could wrap the entire template in a conditional if you want.

<if condition="!is_member_of($vbulletin->userinfo, X, Y, Z)">
    ONLY X, Y AND Z USERGROUPS CAN SEE...
<else />
    YOU CAN SEE ALL CODE HERE...
</if>

For assistance on where to put this code you need to post in the modification thread, from which you downloaded the modification.