Hi @pursuit
I think you are talking about using a WP filter to extend the columns on the user list wp-admin page? correct?
If so, please checkout these docs:
http://pippinsplugins.com/add-user-id-column-to-the-wordpress-users-table/
http://wordpress.org/support/topic/make-extra-columns-in-userphp-sortable
Thanks
E
