Adding static routes for VPN users

[Lou57]

We would like all SSH access to our cloud servers (~70 of them) to come through the VPN and then out our gateway so that we can limit access by known IP.

Does anyone know of a way that I can add a static route to Win7/OS X/Linux PCs that uses a partially qualified domain name such as *.compute.amazonaws.com?

Alternative solutions to the original goal?