Is there a way to make a feature request?
Apparently here is no one dealing with any kind of support or request…
Marking as resolved; if anyone else is interested in the answer, filtering anonymous connections is really-really difficult, and there is no way (technically speaking) you can achieve such task with any plugin; what you need is a firewall, a software designed to do exactly that, there are many in the market to choose from, Sucuri offers one [1] if you are interested, there are also open-source alternatives if you do not want to spend money on that [2].
[1] https://sucuri.net/website-firewall/
[2] https://www.google.com/search?q=open+source+firewall
