It's a Macquarie Bank account in your name. The account is a cash management account (CMA) provided by Macquarie, which is free to set up, earns interest and allows you to move money into USD. 


As Macquarie takes 1-2 days to verify your details, you may have to wait until they have completed this before transferring your $ from your AUD wallet to your US trading account.  


For verified accounts, POLi remains the fastest way to fund.