Option to organize custom permissions on permission page

I just started using this module, and I first want to say "Thank you"! I would like to make a suggestion on the organization of the permission page.

Would it be possible to set the group name for each custom permission?

For example, I am tweaking the available states for moderation in Workbench Moderation from "Draft, Needs Review, & Published" to have "Draft, Needs Review, Needs Moderation, & Published. The Workbench moderation has the following available for permissions, 'Use "My Drafts" workbench tab', and 'Use "Needs Review" workbench tab', and I added the custom permission of 'Use "Needs Moderation" workbench tab' which links to the view listing all of the content in "Needs Moderation" state. This allows content authors and moderators to have "My Draft, Needs Review, & Needs Moderation" tabs show up in the Workbench section of the site.

If I could specify the custom permission as belonging to the "Workbench Moderation" permission group, then it would help when customizing permissions. Not to mention if you wanted to customize the workflow for your clients a little more, you would be able to help with a whole host of other custom permissioning.

Well, what do you guys think?