[Dovecot] can I share IMAP folders for multiple user

[Hitao]

Hi, Dear all,
         Just a bit curious,  could I configure dovecot for two users share
the access to certain IMAP folders in the mailbox?   I searched the list
archive and only found
http://dovecot.org/list/dovecot/2004-April/003236.html and
http://dovecot.org/list/dovecot/2004-April/003168.html, but I am not sure is
this the same thing that I want and where could I find more details?

Wish you a nice day!

Hitao