Hi,
The idea is to use, in your checkout, the "paypal adaptive" plugin instead of the regular "paypal" one.
If you do not use the "paypal adaptive" plugin, only one account will receive the money. For most of cases it will be you but you can configure HikaMarket to pay directly your vendors.
In these cases, HikaMarket will process the sum that you will have to send to your vendors or the sum that your vendor should you pay back.
The Paypal adaptive plugin have a documentation page that you can read thanks to the online documentation in HikaShop/HikaMarket.
You just have to clck on the "help" button when configuring the "paypal adaptive" plugin and his documentation will be display to you.
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.