how do I add a column the user and ip-address

What does this have to do with this module? I think you need to be in the Webform queueu? http://drupal.org/project/issues/webform

I believe this is a legitimate feature request.

This module makes the submissions page available on an override basis. However, it does not implement the webform_results_access hook. As a result on the Submissions page the User and IP Address column are only available to users who are both in the appropriate ACL list of this module and who have the appropriate access all submission/results permission.

Since I would rather not grant all users on the ACL list such broad access I am asking that this module implement the webform_results_access hook for users on the ACL list.

This is resolved by #1689888: Use Webform API hooks