WAL with Publications

[vivekburman]

So, I was going through this article, where it says "Publications" are group of tables whose data changes are intended to be replicated through logical replication.

So, correct me if I'm wrong. Ideally WAL files are DB level synchronized so every table from every schema's log is captured. But as per publications we can mark tables whose WAL needs to be retained?

The reason I'm asking this question is because, my use case is very limited set of tables from different Postgres schema's. Any idea is this feature in PGSync already?