You can create private pools where only whitelisted addresses can borrow from your pool. You can also enable the loans to be undercollateralized, this is optional.
1. Navigate to https://vendor.finance/create-pool
2. Create a pool like you normally would. But take note of the "Borrowers" field.
3. Enter or paste one or more addresses in the "Addresses Separated By Commas" field.
4. Ensure the address is input like the picture below.
Optional: If you trust the parties you whitelisted to borrow, you can enable undercollateralized borrowing...just toggle it on.