Hi,
With HikaShop business, you can edit the emails and thanks to that, you can add some PHP code in the mail "preload" in order to change the recipient address depending the cart.
You can also change the mail subject.
But it will be a modification of the email, it means that if the cart contains several products for several recipients, it won't be possible.
HikaMarket multi-vendor will allow such feature because it will create "sub order" for each vendor in the main order.
Thanks to that, each vendor can receive an email just for him and his products in the order (without seeing the rest of the order).
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.