Now that the user can specify rows and columns to be omitted from the logical replication [1], I suppose hiding rows and columns from the subscriber is an important use case. However, since the subscription connection user (i.e. the user specified in the CREATE SUBSCRIPTION ... CONNECTION ... command) needs SELECT permission on the replicated table (on the publication side), he can just use another publication (which has different filters or no filters at all) to get the supposedly-hidden data replicated.
Don't we need privileges on publication (e.g GRANT USAGE ON PUBLICATION ...) now? [1] https://www.postgresql.org/docs/devel/sql-createpublication.html -- Antonin Houska Web: https://www.cybertec-postgresql.com