Mollom configuration - how to change list of omitted users 'The protection is omitted for users having any of the permissions:'

Currently our wiki (http://www.drivetheamericas.com) is set up so anyone (unauthenticated users) can edit any of the node type 'wiki pages'. We do have Mollom running to catch spam for forums, comments, etc and that has been working great, but I would like to CAPTCHA challenge any unauthenticated users who want to edit the 'wiki pages'. However, when I go to Site Configuration >> Mollom and select configure for the the form 'Node: Wiki page form' I see the following:

"Protection Mode: CAPTCHA selected

The protection is omitted for users having any of the permissions:
bypass mollom protection
administer nodes
edit any wiki content
delete any wiki content"

How do I change the 'protection omitted' list in Mollom's form protection configuration? It looks like Mollom automatically generates this list based on my user permission settings for the Node type 'wiki pages.' It seems like I might be able to change this in the hook_mollom_form_info (http://api.lullabot.com/hook_mollom_form_info) or mollom.admin.inc (http://api.lullabot.com/file/contrib/mollom/mollom.admin.inc) but I'm not sure how to proceed. Gratefully looking for any help with this issue.

(Using Drupal 6.x and Mollom 6.x-1.15)