Dynamic global variable in node based on variable in route

I would like to do the following:

            var globVar={}
            globVar[usr]=["Values"];

            function1(usr){
               //calculations with globVar[usr]
            }

            function2(usr){
               //calculations with globVar[usr]
            }

            app.post('/', function(req, res) {
                var formString = req.body.filter1;
                usr= req.connection.user;
                globVar[usr].push(formString);

                function1(usr);
                function2(usr);
                res.redirect('/');
            });

usr=req.connection.user comes from nodeSSPI module. I need to make this globVar depending on usr so globalVar doesn't get mixed up when users runs this app concurrently. Now it works well but only for single user :)

Now when I start the app usr is not defined. Any ide how to get it's value from route on app initialization?

Thank you for your consideration on this matter.

via plska