Well, I would like to block many Top Level Domains (TLD) as I know no one in most of the world's locations and do not want anything from the places I have no connection to. That function may already work, though I have no means to test it.
So for example, I do not know anyone in Ascension Island; TLD .ac. If I enter "*.ac" or ".ac" in the add rule sheet it returns only "ac" and the rule is accepted. Does that mean that rule I created with "ac" is valid and now blocks all domains from the "ac" TLD of Ascension Island?
This helps blocking unwanted traffic from VPN's, proxies, Tor, etc., and combinations of the prior.
Next; what is the character limitation per rule for adding domains, IP's. etc.?
Is a comma the only delimiter? Such as: .ac, .ad, .rocks, ...
Finally: is there a working wild cards usable or needed anywhere in the rule making in Little Snitch? Such as *.ac or *.rocks, etc.