basically (at least right now) the workflow is: login with ownership > dashboard > project > userstories > userstory > work
so there is no need for urls like: /userstories/1/tasks besides administrational purpose
decide how to handle these
there was something like pretty urls, so in context a url like /my_pretty_userstory_url/tasks could be relevant synonym for actual resource /projects/1/userstories/2/tasks/3+session