Maybe you'd be better off just explaining what you want to do.
No one anywhere is going to get confused about your hashing speed. No one counts work requests as speed, they count work returned.
The getwork protocol doesn't care about IPs, but the tracking database might, so your work may or may not be accepted at all, depending on the server you are talking to. Stratum uses a persistent connection, and I don't know the protocol in enough detail to know whether or not it will accept (on the protocol level) work on one connection that was given out on a different connection.
To clarify, it's not something I want to do, it's something I suspect could be done by ASIC developers (mining before shipping). When I go to blockchain.info, it shows a pie chart showing the dissection of mining pools and their hashing speed. When a new block is found, it shows that IP with a label for which pool it came from. This is why I ask-- couldn't someone just change their IP everytiume they submitted to make it look like they were multiple individuals and not the same miner/pool?