Masking credit card numbers based on username

hello guys, thank you so much for your kind support. actually the users search for a case number in the web application and in this case number in the response page there is a grid where there is a field called credit card number.. the customer want for some users to show this credit card numbers.. for others to be masked.. this is what i really want. i have attached an example when the credit card are masked. i want the same grid for another user not to be masked the first field..