Double session with one user-login

Is het possible that a user logs in and gets the same application two times and on two tabs in the window screen.
So that the user can work on one session without closing the menuitem and work also on the other.

The only safe way to do this is to keep the two sessions well separate after login
Given the way cookies and php sessions work it is enough to use two different urls pointing to the same app after login

Thanks…I also set the global variables to session…I have to test the application.
Now I login with same username/password on a second window tab. I seems to work.
But can I automate that?