Personally i do not know a method through the system as the ádmin rights'take a 'whole' not a single item.
I have read posts about using different class id's (no clue where/when on what topic) but if you are familiar with coding... have a look at an older plugin: UserClass Show v1.0 Although it is not a page.. but maybe the coding provides some more ideas ? Just brainstorming here...
Second, not tried, just idea. If you are able to edit page on frontend, just add custom field to page with user name and on your page check user rights. But you can't edit page on frontend, you need to create your own solution and replace page edit button with yours one.
It's probably me who asked for feature to set "owner" of record and set that only owner can edit me. But I stoped some time ago, it's not planned.