You can use multiple sets of DAU Key cards within the DAU Vault app on your device. The phone or DAU Vault App does not store any asset information and simply acts as a display of the data on screen. The storage of private keys and signing of transactions is done by your card.

To use multiple DAU Key sets on your DAU Vault app, you can simply create or import additional cold wallet(s) using your other DAU Key card set(s).