Hello, glad to see you are using MyDMX 3.
you don't need another universe for front lights as long as you aren't running out of free channels to patch lights, you just need maybe a DMX splitter. But you can program groups of scenes in MyDMX 3 and each group can be triggered individually from each other. Watch my start guide to programming on MyDMX 3.
https://youtu.be/AY5mw3AqCNI
You can purchase another MyDMX 3 interface and use both to get two universes.