Change screen label in a client-dependant way

Hello,

I've searched for this before posting, and I don't seem to find a definite answer. What I would like to do is change a screen label according do custom rules, in a client-dependant way (in runtime or not). I know how to to this in a cross-client way (through CMOD ), of course, but that's not enough for the requirement. Is there any enhancement technique that you know that can help me?

The report is SAPMV45A and the screen number is 4459 .

Any clues?

Best regards,

Joã