I am trying to create a splash page for my Customer Community using Site.com. I've got most of it set up and it looks fine. I wanted to add a section that shows data from a Related object (Affiliation) that is linked to Contact records. I'd like the data to only display the related Affiliation records based on the Contact of the logged in user. I have a data connection element, and I can filter it by Logged In user, but I can't figure out how to link that to the Contact record of the user to then filter/display only custom objects related to the Contact. What am I missing?