There are many bugs with OP2. Some are major, some are minor. Theres one that allows you to remove tubes, while still haveing buildings running. Theres yet another, while hard to duplicate, can be done, to gain free buildings. None of them has been fixed as of yet, however, the OPU version of OP2 has all cheats removed. Thusly, NO ONE can cheat in OP2 multiplayer, no matter how fast they seem. Its all skill.
You can't memory edit anything, to create a cheat. Both versions have to be the exact same. If OP2 recieves a packet of information that isn't consistant with the other clients, it eventually causes a desync (Such as createing more units for no cost, or giving yourself more ore) It only causes the game to crash. So you can't cheat. So don't try.
(And yea, I'm sure if you REALLY wanted to, you could find some way of doing it. But atm, I don't know of one, without somehow altering everybody's clients)