What CMS forum allows authors to moderate their own topics?

Hello, I am looking for forum software to install on my website, which could allow any author of a new topic to moderate their topic with the same rights as a regular moderator, mainly by editing other member's responses.

I joined a hundred BBSs (running most of the softwares) and none of them allowed the authors to moderate their own thread. So I assumed it wasn't a built-in feature, possibly because pyramid moderation was the only one known to developers.

If there are too many forum CMS with this feature then I am looking for a very modern one, in the spirit of the Speech but in PHP.