Returns true if the current user is the owner of this jobid, false else

def user_is_submission_owner(self, submission):
        """ Returns true if the current user is the owner of this jobid, false else """
        if not self._user_manager.session_logged_in():
            raise Exception("A user must be logged in to verify if he owns a jobid")

        return self._user_manager.session_username() in submission["username"]