How to do Row Level Security in SSRS 2008 R2 (or 2012) with Active Directory Groups?
SSRS in the Report Model is available in sql 2008 R2, but not in express edition

check
http://msdn.microsoft.com/en-us/library/ms365305(SQL.105).aspx

and here is how to apply it on sql 2008 R2
http://msdn.microsoft.com/en-us/library/ms365343(SQL.105).aspx

and if you want to create a view and get TSQL and AD to talk

you can use the following functions to get username

select suser_name() as 'usrname'
or select suser_sname() as sname
or select system_user as system_


or if you want to get data from ADSI, you will need to create a linked server connection to ADSI and get users info
http://blog.namwarrizvi.com/?p=254
http://www.kodyaz.com/articles/active-directory-services-queries-using-openquery.aspx

and use the where clause 

finally check this article "SSRS 2008 R2: Implementing Row-level Security"
http://www.sqlservercentral.com/blogs/sqldownsouth/2011/10/13/ssrs-2008-r2_3A00_-implementing-row_2D00_level-security/