The point is the following:
IT fags normally monitor:
1. Type of sites you visit (done via triggers)
2. Amount of time you spend online
So, you can fool #1 by the expertpcsupport, but not #2 (unless you post here and there, scarcely)
My advice? check the Internet policy at work for your company and make sure you are not violating it by posting while at work... The US is quite different to Europe in this regard and they can fuck you up for it, so better be safe. If it's agains company policy to post they can they say you actually tried to hide it by using a cover-up site and will be even worse