Hi,
HikaShop business implement the ACL feature on products.
It means that you can set some ACL rules on a product which could be only see by users in the right groups.
HikaMarket allow to modify this value in the product editing if HikaShop business is installed.
There is no option for the moment which would pre-set and force values on products.
I think that it would be better to have a generic feature which would allow HikaMarket users to configure default parameters for a product, for "pre-field" or "set" (if the vendor could edit the value, it would be "pre-field", if not, it would be "set"). For the moment there is just an option for product auto publishing but such generic option would be far better !
And it is in our TODO list.
But you can already implement this feature thanks to an HikaShop/HikaMarket custom plugin. By catching the product creation, you can retrieve data from a vendor custom field and force the "product_access" value.
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.