Here is the answer;
Comment reply from /u/Double_X_Helix • reply
"I tried it with my friend and he tried it with his friend as well. We can play with 2 players together due to the p2p server which is missing in infinity 3.0 . So basically 2 player online play will work with 1.0 and 2.0 but we can't have 3 or 4 players. I really enjoy that it still works after the servers went down though."
So the answer is YES 1.0 and 2.0 can be played between 2 players online.
Imagination is best if set Free!