Project Users and Job Roles Columns In Expense Report?

I'd like to display the project users and job roles within my expense report. I found the link below, but I would like to transcribe this to an expense report, rather than a view. I was able to get the columns to populate - however its not pulling in the project user data. I am a novice at text mode, but I think this can be done. Can someone help?

https://one.workfront.com/s/document-item?bundleId=the-new-workfront-experience&topicId=Content%2FReports_and_Dashboards%2FReports%2FCustom_View_Filter_Grouping_Samples%2Fview-project-user-list.html&_LANG=en