id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc
16992,Comments - no custom columns hook,stencil,,"There is a do_action('manage_comments_custom_column') in:[[BR]]
wp-admin/includes/class-wp-comments-list-table.php (Line 503)

But no hook to filter the columns of the Comments table.

Small possible fix attached which applies filter.
",defect (bug),closed,normal,,Comments,3.1,normal,worksforme,,