role delegation module : how to fine-tune the 'edit-administer-users' permissions?
The two modules you will need:

Rules:


  The Rules module allows site administrators to define conditionally
  executed actions based on occurring events (known as reactive or ECA
  rules). It's a replacement with more features for the trigger module
  in core and the successor of the Drupal 5 workflow-ng module.


and Context Redirect:


  This module provides a Context reaction which redirects to a given
  internal or external url if the context conditions are met.
  
  You could use this module to redirect users of specific roles to a
  page of your choice, or redirect them based on a path in the site
  (node/2, 'page.htm') to another page or external URL
  (ht-p://www.google.com). Dozens of conditions can be cooked up with
  Context and redirect users to where they need to go.



set up a new rule, have it react on a url (based on whatever url you want to restrict)
set a condition that the user be of the role for which you are trying to limit access
set an action - presumably a redirect to a different page, or perhaps a custom page that tells them they don't have permission to view that url