How to populate a field in Nintex form based on a where clause

I am using Nintex form in SharePoint 2016. I have a drop down field in the Nintex form that pulls out values from a look up list.

For instance, there is a field called, “Vendor” in my main list and it pulls out Vendor Names from a list called, “Vendor.” The Vendor field in the Main list is a drop down (choice field). In the look up list there is a field called, “Obsolete”, which is a Yes/no field.

I need to pull out values based on the following criteria,

“Select all values where the Vendor list where Obsolete = No.”

Do I need some kind of script for that? What are the options.

Thanks in advance.

Regards,

Mayank Shyam