Hi
I'm currently using 6.3.0, with io-net and the full ip stack (vs tiny stack).
On the same processor and on the same interface, 2 processes (P1 and P2) own a separate socket (S1 and S2). Each socket 
is bound to INADDR_ANY:13000.
S1 joins group 239.192.1.1 and S2 joins group 239.192.1.2. 
I expected S1 receives only messages sent to group  239.192.1.1 and S2 receives only messages sent to group 239.192.1.2

But unfortunately S1 and S2 receive messages from  both multicast adresses.  

Does anyone know if this point has changed in 6.4 and io-pkt ? 

Philippe