We already have support for social logins using Janrain. mojoPortal is currently built on the ASP.NET Membership framework but we also support other logins such as Janrain.
ASP.NET Identity is a newer replacement for Membership, it is possible that in the future we will revamp mojoPortal to use ASP Identity instead of ASP Membership but it is not an urgent priority at the moment and doesn't really scratch anything that is itching right now.