Need Help

Hello,
    I want to collect all messages sending to local users ending with
@some.domain
into a public mail box.For example, puting ingoing messages
user1(_at_)ttt(_dot_)com,
user2(_at_)ttt(_dot_)com,user3(_at_)ttt(_dot_)com and user4(_at_)ttt(_dot_)com 
into a mail box
users(_at_)ttt(_dot_)com(_dot_)
    Can the Procmail do so? If yes,how?

Thanks,

Yours,
Sun Shengqiang