[Dovecot] mixture of virtual and plain users

[Kapetanakis Giannis]

Hi,

I have a mail server (postfix/dovecot) running so far with normal
local /etc/passwd users for domain example.com.

mail_location = maildir:~/Maildir
passdb pam {
  }
userdb passwd {
  }

Is it possible to add virtual domains/users to my setup
without changing example.com to a virtual domain?

I can do the postfix part with
http://www.postfix.org/VIRTUAL_README.html#virtual_mailbox

but I'm not sure if I can mix dovecot (IMAP and maybe smtp auth) for 
both local and virtual users.
Any hint would be appreciated.

best regards,

Giannis