[Dovecot] Different Formats Per User?

[Tony Rutherford]

For migration possibilities, we're considering whether it's possible to 
have Dovecot run some users using standard Maildir format, while other 
users would be using filesystem (LAYOUT=fs) format?  We could determine 
which one's users have, but is there a way to tell Dovecot this 
information, and is it even part of the Dovecot design to deal with this 
scenario?

Thanks,
Tony