I don't have anything custom for hlguard on the Atlanta Apoc community server anymore. Maybe I'll put some again in the next version that comes out
You should take a look at your addons/hlguard/config/hlg_custom.cfg file in your file manager from the drop down menu. Select that and hit submit to edit. There are some instructions on how to create your own checks.
For example, the +PlayWAV:
hlg_check "+PlayWAV:Wav Script Detected" "b"