Shared folder filtering (probably a thousand times asked)

[Johannes Rußek]

beloved list,

i'm so free to ask this question probably for the 1000st time: how can i
manage sieve script for shared folders?
i have a few shared folders where i would like to have cyrus filter the
incoming mails with sieve scripts, but i couldn't figure out a way to do
so yet.
any evil and nasty workaround is welcome, even if it is giving the
postuser somehow all sieve scripts, that's absolutely fine.
thanks for your help!
best regards, johannes russek