IFTTT Question

I have an applet to activate motion detection when I leave home, but I can only select 1 camera or all. Is there a way around this?

Easy way: just make multiple applets.

Harder way: use IFTTT Maker to create a multi-action applet.

I am new to IFTTT, how would I do that?

At the top of the IFTTT home page, click your name, then New Applet. Create another applet just like the first, but with the next camera in the THEN portion.