How can I enable a user to edit certain content (a table) on a page they do not have permissions to even view? I need it to be editable from both pages... like an Excerpt Include, but editable from both sides...

[RVal]

I believe one of the options would be to use Include macro on restricted page (among other content) and include another page which is opened . Then user can edit content of opened page and the result of his edit will show up on the restricted page as well.

[Nic Brough -Adaptavist-]

You simply can't.  If you don't use "include" or "include-excerpt" as RVal suggests, then the fact is you have Two sets of tables to edit, and one of those is on a page you've decided to block the user from seeing.

RVal's suggestion is by far the best - have one table on an editable page and include it in the other.