how to team viewer allow specific user by squid 3.1

We have squid 3.1 on CentOS 6.5. We have blocked team viewer by below ACl to All user but we want some specific user allow Team viewer. Please help me to resolve this issue .....

#acl ipacl url_regex [0-9]*\.[0-9]*\.[0-9]*\.[0-9]*
#http_access deny ipacl
#acl num url_regex ^[0-9]+.[0-9]+.[0-9]+.[0-9]+
#http_access deny num

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you can limit the users by using below,

To use the NCSA authentication module, you will need to add the following line to your squid.conf:

authenticate_program /usr/local/squid/bin/ncsa_auth /usr/local/squid/etc/passwd

You will also need to create the appropriate password file (/usr/local/squid/etc/passwd in the example above). This file consists of a username and password pair, one per line, where the username and password are seperated by a colon (:), just as they are in a Unix /etc/passwd file. The password is encrypted with the same function as the passwords in /etc/passwd (or /etc/shadow on newer systems) are. Here is an example password line:

oskar:lKdpxbNzhlo.w

Since the encrypted passwords are the same, and the ncsa_auth module understands the /etc/passwd or /etc/shadow file format, you could simply copy the system password file periodically. If your users do not already have passwords in Unix crypt format somewhere, you will have to use the htpasswd program (in /usr/local/squid/bin/) to generate the appropriate user and password pairs.

Remember to restart Squid for the changes to take effect

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 Actually we have OS centos 5.8 & squid 2.6 & its integrated to the AD. its by default denying team viewer access to all user  so we put ACL to allow specific user by making one group on AD which user have this group only allow team viewer access.

Now we want upgrade OS SentOS 6.5 & squid 3.1 but its by default allowing team viewer access to all user so we put below ACL  for block Team viewer access its working fine but problem is that its blocking all user even which user have full internet access & also because of this Team viewer Allow ACL not working.

Please help me to resolve this issue.

#acl ipacl url_regex [0-9]*\.[0-9]*\.[0-9]*\.[0-9]*
#http_access deny ipacl
#acl num url_regex ^[0-9]+.[0-9]+.[0-9]+.[0-9]+
#http_access deny num

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