HI Uday,
I would say that you could create a new single role just for menus (no authorisations). Create a new cockpit for that role and when you connect using NWBC use only that cockpit (that will filter out the existing menus that you don't want to show).
If you want to try to automate the process you could create a master menu role where you maintain the whole NWBC menu structure and write a program that creates a menu role (based on the master) for each composite role you have. The program would check what authorisations the composite role contains and only create menu entries for those items.
Hope that gives you some ideas.
Thanks,
Simon