Hi prasannag,
it's not clear if you are talking about Knowage LOV and DRIVER or just report (ie. Birt, Jasper) parameters.
If you want call procedure from Knowage Lov I think it could be able if you can do this within the standard sql 'select' statement.
For the second question I think you need to define an output parameter for each value that you want pass in cross and then define a cross navigation through the specific GUI .
You can find more details on Knowage_6.x_CE_Manual.pdf downloadable from OW2 site.
Hope this help!