RegisterTCPServerEx and ServerTCPRead

I have setup a server using RegisterTCPServerEx on IP Address 192.169.0.250 Port 50100.  I connect a client at 192.169.0.1 to it, I get data back and forth like it should be.

I have a second network at IP Address 213.19.59.1 that I am communicating with a cRIO at 213.19.59.2 using Network variables.  This also works the way I want it to.

However, when I combine the two programs into one, the TCPServer callback sees the event TCP_DATAREADY whenever a network subscriber variable is changed. 

I thought that the TCPServer would only be listening to data from it's IPAddress and Port.  Getting the network variable data messes up the parsing the of the client data.  Is there a way to isolated the two networks.