thanks for your reply...let me explain how i am filtering the data...I have created custom list there i am displaying username, desigination, Full Name, Department etc. Then from Infopath I have created Data Conection(Get data from sharepoint list or Library).
So then based on current user open the form dispalying his full name and designation. For example infpath field name txtName:
Filteration given on txtName: Where Username(from seconadary dataconection)=username()
This filteration works perfectly except some users..since i am not populating the useraccount in custom list how can..how can solve this issuee..any help is appcreciated..