BASED ON SYSTEM LOGIN HOW TO ASSIGN SHARE POINT PAGE WITH OUT HAVING GROUP PERMISSION FOR THAT USER?

Hi All,

I am Srinivas, 

How can i give permissions to Active Directory login User in SharePoint 2010. But user not in a group member  of SharePoint site.  is there any chance to assign aparticular page to Active Directory user (He is not a member in SharePoint Group).

Thank You

Srinivas