Shared AR with mutiple targets

Hello, I followed this tutorial regarding Shared AR

https://medium.com/wolox-driving-innovation/augmented-shared-reality-in-unity-b7f88ca98ec1

It works perfectly but the main problem I am having is that I want to use multiple targets for each player. Say one player can use two cards and the other player be able to use the same two cards, how would I go about doing that?

Any help would be appreciated