Hi,
For a vendor, you can specify an administrator. The admin will have basically all rights that the vendor account have.
But you can add the administrator as a regular user too and at this moment, set some specific rights for the account.
To set a vendor administrator or change the vendor ACL, you have to edit the vendor itself in the HikaMarket backend.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.