Multiple Users sharing email address but unique public/private key pairs?

Can PGP associate multiple public keys with the same email address?

Scenario:

5 users have their own 5 machines but all use the same email address for testing, test@test.com.  They do not email each other, but they email a server which has a separate email address, server@server.com I'm looking to avoid sharing a private key between the 5 users using test@test.com.

Can PGP associate all of those public keys with one email and still email back and forth properly with server@server.com?  Or do I have to generate a new email account for each of the 5 machines?

I don't have my full PGP licences yet and the trial version won't let me set up my email proxying so just was hoping to know if this is possible.

Thanks