Needing some sort of web based application that will pull data from 2 different websites and based on the data pulled will determine the function it will take. This is a vague description but if it is something you are an expert at and understand - I will disclose more information.
Website A - is an existing website that requires a login to see data
Website B - is an existing website that requires a login to see data
Web based application - will compare Website A to Website B, and based on that comparison if a proper match is made between A and B, a script will run to fill in fields of website B and submit.