Cliffe asks: "I am a PhD candidate preparing to implement a new security (access control) model. I have been reading about Linux's LSM (which allow security frameworks to be loaded) but I was unable to find documentation for a mechanism in MS Windows which allows every individual application's access to resources to be mediated; for example, to restrict each application's access to particular files or network protocols. Is this type of mediation possible in Windows? Virus scanners and firewalls likely utilize similar capabilities. Where can the documentation be found?"