Designing Column Level Security
While not as common as row-level security (RLS), there are times when you may wish to hide particular columns in a data model from one group of report viewers, but not others. Power BI Desktop does not natively support column security. However, a carefully designed data model can achieve column level security using Power BI's native RLS functionality.
It should be noted that Microsoft has recently released object-level security (OLS) for securing tables and columns in Power BI Premium and Pro. This method of securing objects currently requires third-party tools, such as Tabular Editor. In addition, this method has the advantage of securing even the metadata about the objects such that report viewers without access will not even know that the tables and columns exist in the model. However, there are disadvantages to OLS as well; namely, by completely hiding the tables and columns in the model, it becomes difficult to create measures and report...
