monkeysphere-authentication keys-for-user output does not support authorized_keys options
keys-for-user was intended to output authorized_keys lines that could be used for actual ssh authentication. It currently does not support authorized_keys options specified in the authorized_user_ids file. We either need to acknowledge that this function is not intended to produce authorized_keys lines (which I think it in fact was originally), or we fix it to output full authorized_keys lines.
(from redmine: created on 2010-10-17, closed on 2010-10-18)