Welcome to our forums and many thanks for your interest in our network library. You can indeed achieve that using NetworkComms.Net. All you have to do is disable our custom application layer protocol:
ConnectionInfo info = new ConnectionInfo("192.168.0.1", 1024, ApplicationLayerProctocolStatus.Disabled);
Connection conn = TCPConnection.GetConnection(info);
// conn is now a RAW TCP connection
// use as desired ...