Yes, I meant unauthenticated user. Thank you Khorvat, checking it in code seems simple enough. My hope was to have a group that was associated to unauthorized user whouch would allow me to select or deselect in the properties through the UI (see image). But, it seems that you cannot.
Use case: I have a login webpart displayed but would like for it to disappear once they are logged in.
Thank you for the fast response.