@@sharing view can remove roles that are site-wide, using acquire or other resource?

Question

Suppose ADMINS is a group that has an Administrator role (site-wide).

In a different context of the Plone site (/Plone/folder) I would like to use the @@sharing view, and remove all roles from the ADMINS group and add some custom ones: the problem is that this isn't possible because Administrator role for ADMINS is site-wide.

Is it possible to remove the site-wide role for just a context in a Plone Site? Or will I have to do this by settings individual permissions on custom workflow states?