Managing Vaadin Components Permissions in Liferay

Hi,

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…

Thanks
Krrishna