Dual Boot Ventura + older Mac OS

I have an old iMac (2011) that I was successfully running Ventura on using OCLP.

However I found importing video from miniDV seems to work better for me on Mountain Lion, which allows me to use iMovie 9.0.3. But that OS and even High Sierra seem to be pretty much useless for anything requiring a modern browser.

Is there a way I can dual boot between (say) Ventura and Mountain Lion so that I can have the best of both worlds?