Here is the question:
How do we connect 2 pc 's running pure data, so they can exchange data realtime (ex. one sending arrays to other, and the other translate then to sound and sending it back),
first in a home lan,
and second over the internet?

I think [netsend] and [netreceive] are probably the thing here, but I've never used them. Hopefully their help patches are enlightening enough.

got sth in here:
http://www.pd-tutorial.com/english/ch04s04.html
Thnx!