@ten12design, the basic solution with stock WordPress is to assign that user as the Author of the pages. Then by giving them the edit_pages and edit_published_pages capabilities, they will be able to edit their own pages.
If you’re not able to do that because more than one author is involved, we have offer a premium package that provides two different solutions (which can be used separately or together):
1) With PressPermit Pro, your Administrator’s Edit Page screen includes an Editing Exceptions metabox just like the Reading Exceptions metabox in PressPermit. You can grant editing for the specific page to any user, WP role or custom-defined group.
2) With the Multiple Authors plugin, you can mimic the stock WP permissions model, but with more than one user assigned as author.
For information about obtaining these plugins, visit publishpress.com
