category rule for people NOT in my address book?

How do I add a category for people NOT in my address book?
As well is there an option ‘not in address book’ anywhere for rules?

Thank you.

I am sorry, but it is not possible at the moment.

Actually I found a way to successfully make the rule.

Choose the following:
After message has been received:
Select conditions for the rule: none
Select actions for the rule: stop processing other rules. set categories. move to folder.
Select exceptions for the rule: except from people.[select all in your address book]
This works well.

Great, thank you for the info!