@washington, i have created time restrictions on the domain such that only the Masters students log in in the afternoon while the undergraduates log in in morning hours.there are also specific machines that are dedicated to Phd. students but are still under my domain but they are able to log in at any time. I have not put any restrictions.In addition to that I use the good old &#39;give me your school id when you sign in and take it when you sign out&#39; , I cant totally rely on the last because i also do user support. lemme embark on it immediately.will update you on how it goes<br>

<br><div class="gmail_quote"><br></div>-- <br>&quot;do not look at where you fell but where you slipped&quot; -African Proverb<span></span><br>