Blacklist all countries except US

Hello @dpaule

Yes, you can blacklist any country you want. In this way visitors from blacklisted country won’t be able to post or register on your website.
The guide is here:
https://cleantalk.org/help/blacklist-usage

If you’d like to completely block users from certain countries from accessing your website, please install our Security plugin:
https://ww.wp.xz.cn/plugins/security-malware-firewall/

Security Personal Lists manual is here:
https://cleantalk.org/help/security-firewall

Thank you.