Hi Nailem,
We do not offer wagering on multiplayer stroke play at this time, but you can challenge a friend to a Match Play Challenge multiplayer game for credits. Just click the link to read more about it in the FAQ.
You can also start your own Country Club and create your own tournaments that only your club members can compete in. Country Club tournaments are played in solo play, but it does give you a way to play for credit purses amongst a group of your friends.