Organisation in Mail

Hi, recently moved from Gmail to Mail in High Sierra

I work as managing editor of a magazine and a big part of my job involves keep on top of email (whose doesn't I hear you say)

I've created six or seven different Mailboxes for different areas of my job. One of these, for example is 'feature ideas', another is 'potential news stories' ...so that I can go back and review all of these at one time, keep them in one place etc and deal with them accordingly

Now, when I get a new email on one of an email thread in one of these mailbox, it jumps out of that mailbox and into my inbox — which is fair enough. Otherwise I wouldn't see it. But it means I have to keep re-filing it into my desired mailbox every time I get a new email in the thread, which can be quite often in long email chains.

Is there any way I can permanently tag or filter a message into a specific mailbox/folder/label... as with Labels in gmail?

Thanks

Lenny