Incoming email accounts/aliases

We are looking to use WHD to process emails from multiple inbound email aliases (versus accounts) and assign those differnent types (which assign to different tech groups, locations, etc).  For example:

australia@mycompany.com -> Type: Email Request (Australia) -> Tech Group (Field Techs)

support@mycompany.com -> Type: Email Request (General) -> Tech Group (Support)

from what I can see so far WHD doesn't process the "To" address, only the actual account it's logging into.  This means fro each different group I would need to have a separate email account instead of simply using a to alias.

Or is there a better way to save on the email account administration.

Thanks!