working within a selection based on companyname
I have a database created with customers.
There are diferent people that work in this data base.
I want that after a user has logged in there is a selection based on company name and that person that is logged in only can work with those companies (selection) and the other companies (not selected) do not see.
How can I handle this in a script?
Must i organise this with a login? or is there a other solution?