How to set permission and restrict view to particular user

Using following tool you can set permissions to views and restrict views to particular users. This feature is not available in MOSS 2007.

http://www.codeplex.com/SPViewPermission

How to set field permission in Sharepoint List

Folllowint tool providing advanced settings to customize list form rendering in new, display and edit mode.

http://splistdisplaysetting.codeplex.com/