How to add Name of User in Multiple Logon Screen

Hi all,

In my scenario the multiple logon screen contains the IP address of the terminal and the name of that terminal in which someone is already logged in with the same username. I have attached a screenshot of the same in which "DI-0853" is the name of that terminal or computer.

Now my requirement is to display the Name of that computer owner from a z-table(2 fields in z table- terminal name, name of owner) along with the terminal name.  I have searched for the same in forum but could find the same.

Plz help.