Managing Vaadin Components Permissions in Liferay


I’m using vaadin 6.7 with Liferay.I created 4 tables in Vaadin using Table component and data is displaying successfuly when I use that vaadin Project as Generic Portlet in Liferay.Here,based on the Liferay user,how I can manage permissions to these tables…Does vaadin provides any built in functionality to manage the components with Liferay…Or else is there any work around to solve my requirement.Please Help Me…