1. You can set the price level for each product and prescribe the price level to the client, i.e.
there is a product at a price of 100 UAH, there is a price level Wholesale - the price for this price level is 90, there is a price level Drop - 95 UAH, if you specify the price level Wholesale in the client card, for example, then the price of 90 will be applied to the product in the process
2. in the product card there is a special prices tab -
https://prnt.sc/ufd6m1 , where you can select customers and specify what price for them to apply for these products