How to configure edit permissions for Panel panes? Is there a way to configure edit (not view) permissions for a Panels 'pane'?

I would like to add a pane for 'custom content', for example above and below a view, so that the content manager role that I've setup can edit that part of the page. Seems really simple (and essential), but haven't found anything like this.
That blog post doesn't seem to have been followed up on.  There is some discussion here regarding more granular permissions for Panels IPE: 

https://www.drupal.org/node/1821618#comment-9502245

I mention it would be great to be able to change role permissions for an individual pane such as 'Move', 'Edit', 'Change Style'.