it is peerguardian isnt compatible with osmc since it needs a window manager and since OSMC boots into Kodi that makes it incompatible…
but what a “peerguardian” does is to block ips so we do it ourselvs at a systemlevel using hosts files
you can use already existing projects such as
there are instructions on that site on how to
or you can hack your own script simply enough by looking at the shell script 
p.s it aint that hard it just takes time and you dont have to be afraid to break shit 