The Tor network offers anonymity to those who wish it, but it is also usually used by cybercriminals. That's why WordPress plugin developer thought to develop it Tor Blocker, a plugin that allows administrators of the popular platform to limit the actions of malicious users using Tor exit nodes.
Developed by HQPeak. Tor Blocker is designed to allow administrators to completely block users from the Tor network, or to prevent them from accessing certain features of the site.
The Tor network is often abusively used for spam, to detect vulnerable websites, or other types of cyber attacks. If your site uses WordPress and you have detected attacks, you can install Tor Blocker and apply some restrictions.
For example, you can set it so that Tor users can only read the public content of the webpage. You can allow comments, or the registration of new accounts, or even have access to the panel managements. Of course, if you can grant access, you can also deny it.
If you also want, you can completely ban users from the Tor network.
Tor Blocker is coming free but also with subscription. Tor exit node lists are updated more frequently for those using it premium version. The list in the subscription service is refreshed every 5 minutes, while in the free version, it is refreshed every 5 hours. The plugin seems to be a very good idea, even in its free version, since most of the hits the websites receive come from the Tor anonymity network.
You can try the add-on from here.