Excluding users from queri..

[RichieBoy67]

This is similiar to my last question. I would like to exclude certain users from the following queri. This is not the same queri in my last question and I do not know where to include a where clause??

Thanks

PHP Code:

$DB_site->query("SELECT userid, lastactivity, options, username, user.usergroupid, displaygroupid,
groupa.opentag as opentaga, groupa.closetag as closetaga, groupb.opentag as opentagb, groupb.closetag as closetagb
FROM " . TABLE_PREFIX . "user as user
LEFT JOIN " . TABLE_PREFIX . "usergroup as groupa ON(user.usergroupid = groupa.usergroupid)
LEFT JOIN " . TABLE_PREFIX . "usergroup as groupb ON(user.displaygroupid = groupb.usergroupid)
WHERE lastactivity > " .$cutoff. " ORDER BY username" );