Taskwarrior has the concept of a user defined attribute (UDA) which you can setup all kinds of fanciness for projects / filtering with. I use one called "prio" aka priority and generally set it to H|M|L. These allow you to customize taskwarrior to an insane degree. In fact, they actually rejected a contribution from me to add priority support natively when it could be done with a UDA:

https://taskwarrior.org/docs/udas.html

Really powerful software.