Hi, @GMollevanger ,
I’m not sure if I’m oversimplifying this, but the way I see it would be to have the 2 lists and just have that property where the radio button sits as the criteria. I’d like to think that if you have the form with a property, for example, called “Radio buttons” and the options are “button 1” and “button 2”, then when the selection is made, the data will be stored on the contact’s record.
Therefore, when you create your active lists, you just need to have a criteria that’s “Radio buttons” equals “option 1” for list 1, and equals “option 2” for list 2.
Could that do the trick? 
Eli