This allows a customer to only login on one device at a time.

If they try to login on another device while still logged in then the the login will be prevented and a message shown that tells them that their account is already logged in elsewhere.

If the user is inactive for 10 minutes then the account lockout is reset and they can login again.

This is currently set to 10minutes of inactivity but that can easily be changed in the code.

This one created on 1.5.6.1 and I have not tested it on anything else but should work on most versions.

You will require vQmod for this to work.