title: Restrict multiple user login to web application from same machine when one user is logged on, in asp.net?
body: <p>I have to restrict new user from logging to my web application at the same time one user is loggged on from that system, when both users are using same machine. (ie if one user is logged in then if another user tries from the same machine, i should restrict that second user to login in that same machine)</p>
  
  <p>I think about mac id validation but its not possible to get in c# (cant use active-x javascript to get id).Is this possible to track using cookies..</p>
  
  <p>Can anyone suggest some solution for this.</p>