[@pagal Participant 15 years, 10 months ago]

Yep, You need to integrate your forums with WordPress deeply, where you can set bbPress users table with WordPress users table during bbPress Integration.

After setting up cookies process, allow just registered members to comment on your blog.

For more help see this documentation.

Plus, I can personally help you to integrate forums.

Contact at pagalsoch {at} gmail {dot} com

Best of luck.