[NTLDR]

Use is_member_of()

PHP Code:

if (is_member_of($bbuserinfo, 5)) {
    // user is in usergroup 5 or has it as a membergroup
} 


<if condition="is_member_of($bbuserinfo, 5)">
    // user is in usergroup 5 or has it as a membergroup
</if>

For multiple group checking see the Mini-Mod my merk to allow checking unlimited groups in one call.