Pakon - Monitor VPN; Issue with MAC address

I installed the Pakon package an configured it to monitor my openvpn connections by adding the appropriate entry into /etc/config/pakon (list interface ‘tun_turris’). The traffic is monitored, however the mac address/name resolution field is empty for all entries coming from tun_turris.
Is there a way I can have this information filled in?

Additionally it would be great if the data would contain the interface from which the traffic originated such that it can be filtered accordingly.