Putting restrictions on Printing

Hello Friends,

Following please find my requirement;

We have developed one programme to Print the labels during GR. Inputs for the Transaction of said programme is Material Document Number and the Year. Programme reads and picks the data from various tables like QALS, MSEG, MCHA, LFA1 and MAKT and prints the Label with details like Material Code, Description, Vendor, Vendor Batch, Material Document Number, Manufacturer, Exp Date, Qty, No. of Packs etc and the User ID by whom the Labels are printed. Now as an organisational policy we want to restrict the Printing of these labels ONLY ONCE to certain User IDs and Flexibility of multiple time printing to selective User IDs. How can we address this requirement?

We are thinking of making the changes in the programme such that it will update particular field in QALS once the Labels are printed for first time by a particular User ID but unfortunately not been able to identify any such field. Any suggestions in this direction or for any other solution are most welcome.

Thanks and regards

chandra