Not sure if I am looking at this right but I only see darkstat under Package Manager 2.3. I am interested to see internet traffic by source IP or MAC address and destination IP. I am waiting for ntopng in the meanwhile.
pfSense 2.3-RELEASE (amd64)
DELL Optiplex GX620 Pentium D CPU 3.40GHz, 240GB SSD, 4GB RAM