Thank you Jan, but my goal is, for example:
I create group of customers #1234, and i want give them this #1234 (for example),
and when they're registering in shop they will put this #1234 and will see price with dicount for this group (#1234), and they're not need to my approval as admin,
this should be works automatically
I think i should change admin, products listing, products info etc
Have you any idea how to do this ?