Ot seems that people are missing that you said "COMMENT" permissions. No, I don't know of a way to do that (there may be a module of which I am not aware though). I can't imagine that writing such a module would be super-difficult. The hardest part would be the settings page.
Nancy E. Wichmann, PMP
(781) 697-6344
Injustice anywhere is a threat to justice everywhere. -- Dr. Martin L. King, Jr.
From: toon severijns
I'm looking for a way to set comment permissions per content type AND per role. E.g. role x can access comments on content type a, role y can access comments on cotent type b.