Well, I'm afraid to say that this is not possible in Shopify. It could be one payment option only (any one) for all the products added in the cart together.
Hope it helps! Please let me know of any further questions.
Hi there @andersal!
Don here from Shopify. :)
As @Perennial let you know above, it is not possible to restrict the availability of payment methods in your store in this way.
It would not be possible to circumvent this using an app, as it's a core part of how Shopify works.
Could you let us know some examples of how you wanted to use this, so we can check for any relevant workarounds?
Do you use manual payment methods like bank transfer or do you create draft orders to send to your customers?