SQL Server授予特定行的权限

I am doing the BI reports for a group of 5 companies. Since the information is more or less the same for all the companies, I am consolidating all the data of the 5 companies in one DB, restructuring the important data, indexing the tables (I can not do that in the original DB because ERP restrictions) and creating the views with all the information required. I am doing the BI reports for a group of 5 comp