You can't.
To buy something on Itch, you can only use paypal, credit or debit card.
Payoneer on the other hand, can be used to get paid by Itch if you sell games via Itch. But it is not a payment method to buy things on Itch.
EDIT:
By the way, you don't need a Stripe account.
If you use a credit or debit card, Itch processes that payment through the Stripe payment provider.