No, I haven't gotten around to implementing that yet. It's pretty high up on my todo list though. Currently I'm a bit blocked from adding features due to the process with getting accepted at the extension platform,
https://extensions.blender.org/approval-queue/mpfb/So there's no way to do it in the UI currently, you would need to script it using python. A script would import TargetService and then use the methods there to pick random targets from the head/face categories and assign random values to those.