lp:~openerp-open-net/openobject-addons/ons_advanced_multi_company

This module increases your productivity with complementary tools:
    * a product may have a type that depends on the company from where it is seen
    * a product may also have supply and procurement methods that depend on the company from where they are seen ( >= V1.2 )

Example: a stockable, make-to-order product (supply method buy) for one company may be seen as a service (make-to-order, supply method: produce)