That's a tough one, unfortunately we do not offer such functionality, thank you for pointing this out. First of all, there are no settings in the configuration to add/remove columns for these two screens, as UsersList is a complex IScriptContorol control that wraps two RadWindow controls inside it - edit users and new user. The list view is represented by RadGrid control bound through RadGridBinder. The only way to modify the default behavior is creating a custom control that inherits from UsersList and replace it in the backend pages.Even if you manage to do this, a role does not have an Author/Owner property like content items, so there is no way to get the person who created that user or role. Same concept is valid for all ASP.NET based roles which have only Name, User, and Id. If you have any further questions related to this please do not hesitate to ask, I'll be glad to help.
the Telerik team
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