SharpPcap NoCaptureLocal Workaround using Cluster.

SharpPcap_NoCaptrueLocal_Workaround.cs

using System.Collections.Generic;
using System.Linq;
using SharpPcap;

namespace Workaround
{
    class Cluster
    {
        private static List<CaptureEventArgs> SentPackets = new List<CaptureEventArgs>();
        private static object Lock = new object();

        public static void Set(CaptureEventArgs e)
        {
            lock (Lock)
            {
                SentPackets.Add(e);
            }
        }

        public static bool Check(CaptureEventArgs e)
        {
            lock (Lock)
            {
                foreach (var Pk in SentPackets)
                {
                    if (Pk.Packet.Data.SequenceEqual(e.Packet.Data) && Pk.Device == e.Device)
                    {
                        SentPackets.Remove(Pk);
                        return true;
                    }
                }
            }

            return false;
        }
    }

    class Program
    {
        public static void Main(string[] args)
        {
            foreach (var dev in CaptureDeviceList.Instance)
            {
                dev.Open();
                dev.OnPacketArrival += new PacketArrivalEventHandler(device_OnPacketArrival);
                dev.StartCapture();
            }
        }

        private static void device_OnPacketArrival(object sender, CaptureEventArgs e)
        {
            if (Cluster.Check(e))
            {
                return;
            }

            foreach (var dev in CaptureDeviceList.Instance)
            {
                if (dev.Name.ToString() == e.Device.Name.ToString())
                {
                    continue;
                }

                dev.SendPacket(e.Packet.Data);
                Cluster.Set(new CaptureEventArgs(e.Packet, dev));
            }
        }
    }
}