I have created new Role called "Vendor". So Vendors can add product. For Adding product I am using Woocommerce Plugin.
Below is the scenario what i want to do.
In Admin login, want to add field Margin (%) for Vendor user only, Edit enabled.
In Vendor login, Margin field for display only
Add Margin % to all flowers belong to this vendor
Multiple Vendor capability
I am not sure what you mean by this:
. Add Margin % to all flowers belong to this vendor
. Multiple Vendor capability
However to control who can do what and edit what in WordPress using Toolset you use the Toolset Access Plugin:
https://toolset.com/documentation/user-guides/#access
Custom Fields can be controlled as outlined here:
https://toolset.com/documentation/user-guides/access-control-for-user-fields/
Similarly you can control Post Types, Forms, or other type of content on your site - always using Toolset Access.