Facebook sign up & Mailchimp

I have one MailChimp list for different sign-up methods: 1) sign up website embedded form, 2) sign up web pop up and 3) sign up facebook page. I separated them by groups: website, popup and facebook.

My question is;

By using Magic Action Box, can I add automatically subscribers to a group depending which sign up form they use?

For example, if they sign up at my Facebook Page form, they will be added to a group for “Facebook”. Is this possible? If yes, how do i do it?

I appreciate your help. Thank you