I tried to exclude "Zombie Pigman" from auto targeting AI, but did not work.
I tried forms below:
-Zombie Pigman
-ZombiePigman
-Zombiepigman
-Zombie_pigman

I suppose mobs have names including "blank" are not recognized.
Others (ex. Creeper) are excluded as expected.
As a test, I added "Polar Bear" for targeting exclusion, sure enough, it did not work.

the zombie pigman entity name is "PigZombie", polar bear is "PolarBear". you can use "/awutils exportentities" command to get the full list of entities that includes their names you can use here.

really? what version are you using? I added that one in a release almost two weeks ago

There is no command named "awutils exportentities"
Found commands are below:
-awfaction
-awnpcdebug
-awresearch
-awstructure

I installed the latest one, everything is fine. Thank you!