I'm a MVC newbie and trying to build a simple web app where users can register and log in (already kinda done with the Identity sample for MVC) and also create some objects (for example, to do items in a list) that are basically bound to them, unless they state otherwise.

Basically, if not stated otherwise, a to do item cannot be seen or edited by other users. 

The first step I'm trying to get done is to populate the list only with my users' items.

Can someone please point me in the right direction?