You can set up products that accept different currencies but not all on the same product. You will need to add a different product for each currency.
Beneath the product name field in your product editor, you will be able to change the currency.
To get here you will want to go to your sellers dashboard and then you will either want to edit or create a new product, whichever your goal is. Then at the top of the page, under the box to type the name of your product you will be able to select the currency you desire.