I've got a weird request, but you might understand why. My MacBook Air is normally protected with a screensaver that also locks the OS rather quickly to prevent it from getting stolen or accessed while I'm away. But, when I'm home, I don't want that feature enabled, as I'm obviously in a more secured location and I can feel comfortable walking away, or if I need my wife/kids need to surf on it or something. Is there a way to change certain System Preferences such as these, depending on your location and what access point you're connected to? I don't want it time-based, since my schedule is all over the place. Thanks in advance.