Might not support your hardware
Consider visiting the developer’s website and downloading a demo before you purchase this. As it turns out, it launches with a warning that it’s incompatible with the microphone plugged into my mac, and the device (a plain old USB headset) shows up in Micro Snitch’s menu as “Unsupported." Your mileage may vary, but this is a very fundamental limitation: it can’t watch my default input device. That makes its monitoring useless in the most likely audio input scenario.
brian.mcgroarty about Micro Snitch