Prices depending on the customer

Site URL: http://www.a-mfasteners.eu

Good morning, everyone, 
I am looking to put in the members area variable prices, ie, depending on the type of customer that is to appear a price or another, from Squarespace have told me that they do not have this feature but I have been recommended to post here in case any member had done so. 

Do you know how I could integrate these price variants according to customer? 

Thank you very much