Internet Password Lock 

Password protect Internet access (Web surfing, Instant Messaging, email, etc.). Once you install the program, the Internet is blocked when Windows starts. Input a password to restore access. You can then access the Internet until you lock it again.
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iNet Protector 

With iNet Protector you can restrict Internet access or password protect Internet connection at specified times or on demand. You can disable connection completely or limit Internet to work with allowed programs and services only.
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