If my bank receives a writ of attachment on my account, How many times can the creditor exercise that writ. Just one time, or can they continue to take money from my account?

THey can continue until the full amount of the Writ has been satisfied.

I believe it depends on the rules for the particular jurisdiction.

It depends on the jurisdiction and the wording of the writ. The writ could specify a one time levy or it could be reusable.