this takes a little hand coding to only show the error if the user is logged in.
look at the Logged into user rule, and make note of the users ID session variable name.
then add another if statement just before the error message. SO if the error is:
"Access level restricted"
change it to:
<?php if(isset($_SESSION['SecurityAssist_UserID']) { ?>Access level restricted<?php } ?>
where SecurityAssist_UserID is the name of the logged into users session.