I use several email addresses, each for a different interest and group I communicate with
I do the same - sometimes, if I have to supply an e-mail address, I create one for that specific purpose, so I know that, if I get spam on that address, where it comes from.
However, that's all irrelevant. It won't help against the (Korean) spam this forum recently has been flooded with. The only option is to report it to the moderator so it gets removed.