Hello. Thank you for contacting the Toolset support.
Well - there is no such feature available to control the access for individual posts. As I understand, you want to give access as the Associates should only be able to see and edit the Custom Posts created by the company they belong to in backend, correct?
Yes, something like that...
I currently use the "WP Private Content Pro" Plugin to give individual access to Posts on a User by User basis
What my thoughts where for your Access plugin, is to give GROUP access on a Post Author basis.
For example..
If I have Custom Posts named "Projects"
In the Leader's/ Author Front account page,
Thee would be a list of Users inside his organization with checkboxes,
and a setting reading:
"Allow these users to edit my Projects"