This IP address you should see on the Access List tab as Your IP. If you see a different IP address there, most likely your website is behind a proxy server.
Read more in the WP Cerber documentation
Cloudflare and WP Cerber
An essential WordPress security solution. Defends websites, online stores and blogs against brute force attacks, bots, hackers, and spam. It is unstoppably on guard for you, so you can rest easy or do your online business.