How to restrict a user to connect to only a group of computers?

I have windows server 2008 r2 and active directory infrastructure managing hundreds of users.
I would like to restrict some users to logon to a specific group of computers. For example, in site A containing 10 users and 10 computers, i would like to restrict a specific user to be able to login to only those 10 computers in all the infrastructure.
How can i achieve this please?
Thank you.
Lotfi BOUCHERITSystem administratorAsked:
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Shaun VermaakTechnical Specialist/DeveloperCommented:
That is already built into AD. Look under account info on user. You might need to add more devices than what the users actually log on to

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Sajid Shaik MSr. System AdminCommented:
as said by Mr. Shaun it right... at domain level

if you are considering seciruty... and have manageable switches the best option is saggregate network with Vlans ...

all the best
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