Huta and Iman bin Laden (Osama's sisters) are both implicated in the Al Taqwa bank scandal.
I'm not aware of any connection they had other than being on a list of shareholders. People with lots of family money tend to be holders of shares in a wide range of companies, and often aren't even aware of what their holdings are. And Arab banks are notoriously vague even in their internal record-keeping, never mind any formal published records that could allow shareholders to know who the bank is dealing with. Major US banks have also been found to be laundering terrorist money, without the knowledge of senior executives or major shareholders, even though record-keeping and regulatory monitoring of US banks is detailed and extensive. In fact, Citibank and Bank of New York were found to be involved in Al Taqwa transactions, but there was no evidence that anyone at those institutions was aware of this, other than perhaps the account officer for the accounts through which the transactions were being made. No other bin Laden family members were on the list of Al Taqwa shareholders that was publicized, and women don't exactly call the shots in Islamic terrorist organizations, so I tend to think that these sisters had no real involvement. The Swiss banking authorities have certainly taken a much more active role in protecting Al Taqwa's operations than the bin Laden sisters have.