Hi,
That's something in my TODO list for HikaMarket 1.7
The current system is based on the HikaShop warehouses ; and in fact, the system can just be based on that.
With "shipping per vendor" HikaMarket creates virtual warehouses depending the vendor ID.
When you affect a vendor to a shipping method, it affect the warehouse with a special ID containing the vendor ID.
The idea beside the improvement, is to propose a Joomla user group and let HikaMarket load the shipping methods not only for the "warehouse with vendor ID" but also for the "warehouse with the vendor group".
In that case, you would be able to put several vendors in the same Joomla user group and these vendor will propose the same shipping methods during the checkout.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.