My list of missing features in OS X is getting shorter and shorter but there is one thing I’d really like: Access controls based on which wireless network I’m connected to.
In a nutshell I want my laptop to recognize that I’m currently at home (ie. connected to the wifi in my apartment) and therefore don’t need to type in my password whenever I exit the screensaver. Yes, it’s a potential security risk but I’m lazy and I have a non-trivial password so I’d rather not type it two hundred times a day if I can avoid it.
You should have a look at: http://www.symonds.id.au/marcopolo/
I believe it can be setup to do what you need.
Thanks a lot for the hint!
I already gave MarcoPolo a spin (I should have mentioned it) but there is an issue with Snow Leopard: The WiFi evidence source does not work and unfortunately the WiFi is the only clear indicator of my location.
Another app is Networklocation (http://networklocationapp.com/).
It is 29 dollars, yet I use it to replace my trusted MarcoPolo that worked so nice up until Snow Leopard :-(