About database replication via proxies

My computer is in a LAN, and I need to use a proxy(the proxy is not in the Lan) to access and replicate the IBM Lotus Forum by Notes. However, I can’t access my own Domino server if I use proxies. So is it possible to replicate some databases with a proxy, while other databases replicated without proxies. I know I can do that by changing my location setting. But that’s troublesome. Is there any better way to do it?