Ignore notebooks by client / yet another selective sync request

Dear all,
I was wondering, is it possible (or probable) to be able to ignore certain folders when syncing on different clients?

For example, say I have my main workstation running joplin (with E2E) ~ on this workstation I have many notebooks, some including sensitive information.

I would like to carry some of these notes synced on my smartphone, but only those that are in folders I have marked to be synchronized - the other olders I have not marked should be ignored.

Meanwhile, on another workstation I am able to synchronize all notes, including those in sensitive notebooks.

This is different from the other selective sync requests on the forum in that the selection of folders to sync is done in the client.

thank you!