Modification in MSI

Question

hello

I am in requirement of adding an identification key in my Windows App Setup and don't want it to be entered by the User. Basically the Setup will be downloaded from the profile of the User and the identification number which is a code has to be in the setup so that it can be used Further and i don't want to make multiple Setups for multiple Users 

 

Any help or approach is welcomed and i appreciate your help in advance