Signature for select Roles in Q&A plugin

A feature i would love for the Questions & Answers plugin is to allow Only people under a specified User Role, ( or specific individuals even ) the ability to have a Signature, just like you often see in Forums.

Why I need this, on my Q&A site there are top contributors who answer a lot of questions, and id like them to be able to display specific information under each answer the give without having to type it each time.