Is there anyway to determine if a member registered through the Facebook app or if they registered through the registration page of the site?

Thanks!

In 3.4, there was a little Facebook icon next to the email address in the ACP member list. In 4, this is a good question... I don't know if this is gone or not as I do not have Facebook setup right now on my test instance nor does it look like that Facebook icon carried over on old members.

Yea I am not seeing anything to designate them...thanks for taking the time to respond!