Restrict Charts Datasource View access to a list of users

In the past, I’ve been able to restrict who can view a Chart data source. With the security changes last year, it doesn’t appear I can do that anymore. Am I missing something?

My use case is that I have a single collection of sales data for multiple salespeople. I have Chart Datasource views that $matches the salesperson number, but I need to ensure other salespeople can’t change to another salesperson’s data source.

Thank you!