AutoNotification delete notifcations that don’t contain a particular word with autonotification?

I am trying to block twitter notifications from a particular person because I get bombarded with his tweets all day. However, there are a couple of critical tweet notifications from him that I need to receive. I want to block all twitter notifications from this particular person EXCEPT notifications that contain the following text: bet

how should I do this? Would enabling "invert" means that it'l delete all notifications that don't have that particular word?