Hi,
The "vendor panel menu link" is managed by Joomla.
HikaMarket can't override the display. The best is to use Joomla menu access.
It is planned that HikaMarket could affect a group to all vendors. At this moment, you would be able to make the difference in Joomla, thanks to a group.
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.