Why yes it would be, but thats the beauty of it. Any hints?

I've read the license agreement for my webservice and specifically note the clause "one call per second per IP address", my question is about "masking" IP addresses. Is it possible to route my webservice calls through a proxy server in combination with multiple worker threads thereby possibly making more than 1 request per second? I've seen this technology before concerning web surfing. There are free proxy servers willing to route your packet traffic, I'm just not sure how to implement something like that. Basically give each thread its own proxy server that can route 1 call per second with the end result being 10 threads means 10 calls per second approxiamately.