This is a very simple extension I wrote for Organize Series to add some access control to series.
Add Author meta data to series
Authors can only edit or post to their own series
Add Author column in manage series page
You may also want to install User Role Editor to give Manage Series permission to Author role.
I used current_user_can('manage_options') to determine if the current user is an administrator. Feel free to tell me if you have a better idea.