A texture can be sent over the network using either the MJpegStream nodes or Spout in connection with TCPSpout.

Alternatively you can convert a texture to a byte-spread using AsRaw (EX9.Texture) and send it over the network, eg. via TCP and convert the byte-spread back to a texture using DynamicTexture (EX9.Texture Raw).

For local texture sharing between different instances of vvvv or even other softwares you can Spout or simple texture sharing via SharedTexture (EX9.Texture). See its helppatch for a demo.