how can i create many transport for one seller ? i mean,some of my sellers wants to be able to send it or that his client come to his shop picking it up.
If you are using our module Agile Seller Shipping module, then each seller can create private carriers. Seller can do that at front store My Seller Account - Shipping tab. (You must install Agile Seller Shipping module).
Admin can also create public carriers for sellers to share. With the latest version of agile seller shipping module, admin is able to create multiple public/shared carriers for sellers to share.
I hope this answer your questions.