work areas

I’m not even sure the correct terminology to use for this query. I am building a site that will have a variety of suppliers. One type of supplier will be party entertainers. As such, even though the business will have a physical address, they don’t want that address to be the basis for the search. They travel to multiple locations to provide their services (ie the clients place or a particular event). So the listings really need to have an “Areas serviced” type field. Ideally maybe postcode driven. For example – JimBob the Party Clown has a business based in Bundoora, but operates his services in all Melbourne metropolitan areas, so wants to appear in all the suburbs of melbourne, or at least the main surrounding areas… but doesn’t really want his base address published anywhere. Is there any way to do this, or will JimBob need multiple listings?