Hi,
I'm sorry but it is not possible for the moment.
I have in the HikaMarket TODO list the task to create an import system for HikaMarket (in the front-end, for the vendors).
One idea behind this development is also to improve the HikaShop import with new idea and new features ; one of the improvements is to allow plugins (or external components) to be plug on the import.
So thanks to that, HikaMarket would be able to access to the import request and handle some specific columns.
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.