Hi,
If you want to import the prices of products and you want to restrict them to user groups, you need to have the column price_access with the user group ids separated by comma, separated by a |.
So for example:
product_code;price_value;price_access
product1;10|20;,4,6,|,5,7,
product2;15|25;,4,6,|,5,7,
This will import the price 10 for the user groups with the id 4 and 6, and the price 20 for the user groups with the id 5 and 7 for the product with the code product1, and the price 15 for the user groups with the id 4 and 6, and the price 25 for the user groups with the id 5 and 7 for the product with the code product2