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create table Views (
id int(11),
...
IPAddress varchar(15),
DateAdded timestamp default current_timestamp
)

if ($session_data->{'LoggedIn'}) {
    $existing_view = $db->selectall_arrayref(qq|Select DateAdded from 
+Views where Id = ? and (IPAddress = ? or UserId = ?)|,undef,($id,$r->
+connection->remote_ip,$userid));
} else {
    $existing_view = $db->selectall_arrayref(qq|Select DateAdded from 
+Views where Id = ? and IPAddress = ?|,undef,($id,$r->connection->remo
+te_ip));
}

unless (@$existing_view) {
 # get our cookie of id's
...
 $cookie = $id;
}
# set the new cookie