assign open socket to a channel ?

Hi,
There is a way in wcf with or without peerchannel to assign an open socket
between 2 peers to a channel ?
for ex:
I want to create direct connection between 2 peers , using the peerchannel I
have nat/firewall problem , but I succeded to create this connection using
other secanrio , I prefer to connect to the other peer with direct
connection instead of relay secanrio as possible as can.