Here is the documentation for adding input controls to reports in JasperReports Server:
http://community.jaspersoft.com/documentation/jasperreports-server-user-guide/adding-input-controls
Scroll down to the section that deals with query-based input controls. Your input control will have a name, such as deliverer. In your report, you must add deliverer as a parameter and reference it in your query, as you have done in your comment.