The replication-listener code in LiteCore doesn’t currently support any form of authentication.
(It’s also worth noting that this code is only in the (paid) Enterprise Edition, not in the open source repo.)
LiteCore has no notion of ownership of documents or of per-document access control, so there’s no way to filter to “their” documents. That’s a big part of what you get from Sync Gateway.
—Jens
Jens Alfke — Mobile Architect — Couchbase, Inc.