discard for certain users

[Léon Keijser via amavis-users]

Hi,

We have $final_spam_destiny set to D_PASS so users can filter spam themselves 
(eg. junkmail folder). However, we're making use of the virtual map in postfix 
where incoming mail is automatically forwarded to an external address. As per 
D_PASS, spam will be sent to those addresses. Is it possible to create a list 
of addresses that will have spam mail discarded?

thanks

Léon