Show restricted authors for a category

Hi, there is a method to print, in a front-end page, the restricted author’s list, who is able to write i that category?
I need to show who writes in a specific category. Using “Restrict Categories” I can associate author to category, but how can print the list on blog’s page?
I can do it with “Author Avatar List”, but it work only on whole blogs or single blog (in a MU installation), but now I need the same thing on a single-blog wordpress.

Thank you.
Luca

http://wordpress.org/plugins/restrict-categories/