[Feature Request] exclude VPN or exclude by ip/mac

[samlux04]

In my case when I used OpenVPN v2ray on the router the accounting also count the router. So the total would be doubled, and half of it was the VPN connection I guess.
So I want to exclude this VPN connection or maybe the router itself from accounting. I tried playing with the subnet since the router IP that showed on nlbwmon wasn't from the same subnet but from isp. But no luck so far.

picrel: