This specifically refers to, for example, if you want to exchange BTC for ETH and then send it to another address, you need to use a cross-chain bridge, and they can find two associated addresses. This Xan can help you first mirror the two currencies, and then withdraw the mirrored currencies from the XAN treasury to the mainnet.

From an observer's perspective, they can only see that the treasury sent you an ETH, but cannot see the original BTC.

Whose white glove, whose lifetime.