Pdfreport, dynamically run time display label

I have a field named field1 with a value in db.

In pdfreport, for each logged in user, label of this field is
different in pdfreport.

How do I change its label in pdf report for each user? (I think in onload or onrecord in pdf report, can I change label , if user=x, label =y?)

My view we can’t change label in pdf report. Is there a way out?

I am making a. Invoice pdf which has different field label for each user.