I am trying to figure it out how can I implement this idea, I saw that this question already been asked but I haven't found an answer for that.
Does someone maybe knows what are the options available? . . .
[I want to rephrase my question, Let's say I have 2 users in the ORG and they can see all products in it, If I have an opportunity in my system, I want that each user will be able to add product line item to the opportunity BUT only from the SET of products he is working with. I thought to set different pricebooks for different users but then realized that only one pricebook is permitted in an opportunity]