Request: More pages capabilitites

Hi all,
I would like to request a more accurate set of capabilities for editing pages.

For posts, there are many more capabilities than for pages:
publish_posts, edit_published_posts, edit_others_posts, edit_posts which exactly defines owner’s ability.

But, for pages, there is only one: edit_pages, which allows to edit owner’s pages as well as others’ pages.

I would like to limit (some) users not to edit others’ pages, only to create new pages and edit their own ones.

And if I understand the WordPress’ capability system, I’m unable to achieve this due to one one capability for pages.

Regards
Locus