Does a user need to log off and log on again so new security rules become active?
No. PortsLock assigns a user’s permissions “on the fly” exactly as Windows does for files and folders on an NTFS partition. Q: What rules will be applied if two users are logged on simultaneously (e.g. in case of Terminal Server) to the same computer? A: It doesn’t matter how many and which users are logged on the same computer. The only thing that really affects the rules procedure is what user’s (security) context has a process (thread) that is trying to access a network. It works exactly as do file’s and folder’s permissions on an NTFS partition.