Hello @Bhavin Tandel,
I checked the HDP code and Zeppelin does not support multiple principalSuffix. Having said that, I didn't quite fully understand your question.
"... so that users from different can login into Zeppelin without specifying full realm?"
So do you mean to support Zeppelin login from two different realms? If yes, then I'm sure that such functionality doesn't exist in Zeppelin today (with or without principalSuffix). At this point, this looks like a new feature altogether. I'd recommend you to shoot a mail to Zeppelin users mailing list.
Hope this helps !