How to restrict users to synchronise from AD to FIM 2010 r2

Hi,

I am trying to synchronise selected users from Active directory to FIM 2010 r2 Portal  .

I have multiple OU's in AD and each OU having multiple users . I want to restrict certain users from OU to be synchronised to the FIM 2010 r2 Portal. Any ways to achieve this ?

Regards

Anil Kumar