This plugin is working on multi domain site

Hello.

Thank you for your request.

Yes, the CleanTalk plugin is fully compatible with WordPress Multisite.
We offer special package for it. Details are here:
https://cleantalk.org/help/licence-for-multisite-environment-wpmu

If you don’t use multisite, CleanTalk works with sub-domains as well. It doesn’t matter how sub-domains are organized.

Your CleanTalk Control Panel: https://cleantalk.org/my/

Please, mark this topic as “Resolved” if this reply helped you.

Best regards.