Infopath dropdown filter

Hello,

How to filter the data

I got all the project name in dropdown when you select the project name in other textbox the project id will come automatically.

so I want to get only those project name that is assigned to that particular user.

I have

ProjectName(dropdown),

ProjectId(Textbox),

Employee code(Unique value),

employee Id (Unique for particular employee means if User A works on 5 projects so for all 5 projects the employee Id will be same),

Project Id( 5 projects 5 different id)

I didnt get the exact formula or I have to use any javascript code.Any help...

Thanks,