Multi vendor site

Good evening. i’m writing this because i want to create a multi vendor site for my brand.
The problem is that i want to do this:

1) If my customer is not registered, he cannot see the prices.
2) Once he register, he can shop what he wants.
3) When he goes to payment, based on where he is (ex. Milan), he will pay the vendor that is my distributor on Milan. If he is in Rome, he will pay the Rome distributor obv.

It is possible to do something like this? So my costumer doesn’t know that is paying the Milan distributor until he is in the payment site.

Thanks in advance for the replies!