Very easily. There are several ways to accomplish it.
One way, would be to use something like the keywords field. For 5.1 audio, add a 5.1 to the keywords, for Hi-Rez, add Hi-Rez as a keyword, etc. Then filter based off keywords.
If the files are physically separated on the server, like you have a separate folder for each group, you could filter by fileath.
As an example, assuming they are separate folders for each group, right click Audio in your tree and click "Add Library View", choose whatever style you'd like in the popup (I'm partial to panes) and name it 5.1 (Or whatever). You'll now have a new view called 5.1. Right click that view and choose "Customize view". In the middle of the screen that pops up look for "Set rules for file display" and click that. Choose filename (path), contains, C:\5.1 Audio\ (or whatever your path is to your 5.1 audio files). This view will now only show your 5.1 music.
