KSB1 Restrict viewing of salary cost elements

In actual cost line item report KSB1, how can we limit usersu2019 access to certain cost elements such as Salaries? With control of authorization object, users currently can view the salary cost (element) items but cannot drill down on the underlying details. But we want to go further with the restrictions by excluding viewing of the cost elements?

I was trying to create a customized transaction code, e.g. ZKSB1, that will bypass the selection screen but without success.

Appreciate any insights or workaround for this.