Sharepoint result source query filter using query string

First find out the Manages Property of the Site Column which you want to filter data.
My Site Column is: EmpGroup
How to find Managed Property
Go to SharePoint Site-->Site Settings-->Search Schema -->
Enter your Column name : EmpGroup
Click on green arrow.
Managed Property is: owstaxIdEmpGroup

General query:
path:"<Source site>" <Managed Property of the Site Column>:{QueryString.<Query String Name>}
Now I will write Result Source query:
path:"https://SP/teams/MyHR" owstaxIdEmpGroup:{QueryString.group}

Now My URL is:
https://SP/teams/MyHR/welcome/career?group=IT