I am half way there with eriktisme's idea

I changed the Session.php from 'driver'=>'file' to 'driver'=>'database'

Now each active session is being saved in the Database table "Sessions"

But the problem is its saving only id, payload, last_activity and even for the same userIDs the id is different.

If i could somehow store an extra field say "user_id" i can then achieve what i asked above using database observers.

But how do i store "user_id" and instruct laravel to save it everytime a session starts?

Do a before filter on every page.

App::before(function($request)
{
    // Check if user is logged in
    // If true store user id
    // else don't
});