How to call ADFS Login Page Customizable(If i want to call adfs login page or simple login page) based on some indicator?

I've to implement ADFS Login authentication with my web app,like if someone hits my web application then it should redirect to ADFS Login page first then if authenticates it should proceed and display the homepage.I've implemented this,now the issue is I want to make this call indicator based because i have product not project.We want to implement this ADFS for one client not for all ,rest of all will have normal flow of login page.I want to make this adfs page indicator based like if i have some indicator=1 then it should open ADFS login page or else simple flow should proceed ?Please Help.

Thank you.