messing around with this mod and plethora, and noticed that the plethora modules dont work inside of the peripheralium hub because
"not attached to this computer"

this might be how plethora is programmed, if it is ill report it to them

Hey, thanks for report! Unfortunately, I will able to process this only after end of Blanketcon :)

So, issue was that I attach actual IComputerAccess instead of wrapped one (because for wired modems you usually need wrap it with extra logic).
This is fixed in 1.4.0 release