I want to give help portal link with multiple portal groups but want to set params on that link.

[Aditya Mohanty]

I have create a jsm  portal link and with portal groups . But i want to give that portal link with some param fields set . So that through same help portal link i can birfurcate the link for new and old customers . 
For new customer couldn't see the request type which we will share in the link for old customers.

[Nikolai Ruban]

If you have some automation plugins such as ScriptRunner installed on your instance I'd suggest to use REST Endpoint to do necessary calculations. Create REST endpoint and when usertries to access it do user-organization calculation and further redirect request to correct portal.

In case you don't have any of the automation helper. You can try to create JSP page, similar to

jira_installation_folder/atlassian-jira/startup.jsp but in my experience that would be much complex task.