Hi SubratGaur,
If I have understood you correctly, you are asking if the attendee (viewer) can take control of the sharing application or start application sharing.
The attendee can request the control of the sharing application by click on "Request Control" in the Viewing Window.
The attendee car start sharing by clicking on "Share" and choose the application.
You can find out more information about SharedView in the SharedView help page
http://www.connect.microsoft.com/content/content.aspx?ContentID=4794&SiteID=94
Please let me know if this answers your question. Thank you for using SharedView.
Tony Lee