This is the only feature missing that is stopping me from switching from 1password. With their recent push to try subscriptionize everything it has turned me off them quite a bit.
I currently use 3 vaults: 'Personal Passwords', 'Work Passwords' & 'Shared Passwords with the wife'. All syncing to Dropbox and the 'Shared with the wife' one being in a shared folder she can see.
I am greatly looking forward to Version 6 if it lets me do something similar!