Require login on wake for certain networks?

[atomicbop]

I'm wondering if it's possible to set os x to require a password on wake only when I'm not on my home network? I take my laptop to contracting jobs, so if I'm away from it I don't want people snooping around, but when I'm at home I obviously wouldn't care. Could this possibly be achieved with an applescript?

I'm running os x 10.6.6

Thanks

 

[S.B.G]

There is no native way to do this in OS/X, but I suppose it's possible to be done using scripting, but I kind of doubt it.