Perch Permissions: give user the right to edit just a single page created by an...

Is there a way to give a user acces to just a single page?

1. I'm thinking about giving this group of users a Role to just edit region content.
2. Disable this Role in all content regions
3. Now I want to add just one user to be able to edit this page (besides the admin off course).

Is there a way to easily do this?

Example:

> People.php
>> Person.php (subpage)
>>> Profile (editable region), Micro Blog (multiple items region)

1. For every person the Admin makes the subpage Person.php
2. The person gets a user account with a Role that has no acces/permissions to all the pages (set in region options) but does have the permission to edit content (set in users > roles)
3. Now the Admin sets a permission for the persons account just to be able to edit this page (or region maybe)

Thank you,

Joeri Kosters.