I have many users, and it is not feasible to have one multichaind instance per user. So, users will (somehow) need to safely share a wallet on the same multichaind instance or (better) have a wallet each on the same multichaind instance.
What is the recommended (secure) solution for this? In case of multiple wallets on the same multichaind instance, how to I create these wallets and how do I specify which wallet to use in transactions, e.g. when sending money?