how can i manage some design patterns to solve this problem

In a given distributed system, subsystems interact in complex and uncontrolled fashion. The goal is to design the system so that access to some of the services of each subsystem can be restricted dynamically (for a certain subset of clients).These restrictions should be continuously reconsidered and reapplied at runtime ,based on the status of the system (as to workload distribution) and the history of problematic accesses (e.g erroneous service requests) . thanks a lot in advance