Some app.config settings on a per user basis

I'd like to see more settings available on a per-user rather than per-endpoint basis. One example:

I use SC to do remote support for my clients. I'm almost always connecting in when they're there, so I never want to blank the monitor. I've provided access to SC for a client who wanted access to their own PC, so i created a user, customproperty with their name to give them access to their PC only, all that jazz. They can log in and use SC to connect to their PC and only their PC. They want the ability to blank on connect by default because they'll only be connecting to their PC when they're out of the office, so they don't want anyone snooping around and looking at what they're doing remotely. However, this is the same SC install on their PC that I connect in to when I support them while they're in the office, so I don't want it to blank. Setting the app.config on their computer would make it so that no matter who connected, they'd get blanked, which isn't ideal. If the preferences were attached to the user, then they'd get the blanking default they wanted, no matter the computer they connect from or into, and I'd get my non-blanking that I want.