How to create a custom voucher with Velo for Editor X?

In the Marketing and SEO settings you can create coupons for the store, which are redeemable with a special code. This in itself is very handy, but unfortunately we can not quite set the voucher as we need. However, since I saw that you can sort all vouchers by Velo and other apps, it should also be possible to create an individual voucher with Velo.

Does anyone have an idea for this?

We would need a voucher that is valid for exactly two product categories. Depending on how often the article is in the shopping cart, the € discount should be deducted 1, 2 or even 3x. The voucher should be redeemable only once per purchase, but should also be able to be used by multiple users.