First you’d want to use the Project Logical Editor rather than the Logical Editor.
Seems likely this might be doable, but you never know what showstoppers might crop up until you get into the details. But here’s some stuff to get you started.
One cool thing that is often overlooked is that you can name colors in your pallet and the PLE can do stuff based on those names. So you can name that red color “Strings” instead of the (I think) default like “Color 8”
Make sure to enable Select Colors by Name
Here is a PLE to set selected Tracks to a color
So setting the colors is straightforward. But selecting all the Tracks routed to a Group Track is the tricky part. The PLE can’t do it as far as I can tell. A quick look at the Key Commands didn’t have anything jump out. But if there were/are then you’d probably end up with a Macro that runs some PLE Presets and Key Commands. If you solo a Group Track it should also Solo all the Tracks routed to it, maybe there’s some way to select the soloed Tracks, although I can’t think of anything right now.
I have a PLE Preset for every color in my Pallet, which in turn are mapped into buttons on Metagrid (could be just assigned to KC’s). Then when I add a new Track I know what it is and hit the appropriate colored button - but that isn’t automated based on the destination, I just set it because I know what the destination will be.
Hopefully someone can think of a clever workaround.