TSRef - TypoScript Reference
4.1.7. IP
Syntax:
[IP = ipaddress1, ipaddress2, ...]
Comparison:
The values are compared with the getenv("REMOTE_ADDR") from PHP.
You may include "*" instead of one of the parts in values. You may also list the first one, two or three parts and only they will be tested.
Examples:
These examples will match any IP-address starting with "123":
[IP = 123.*.*.*]
or
[IP = 123]
This examples will match any IP-address ending with "123" or being "192.168.1.34":
[IP = *.*.*.123][IP = 192.168.1.34]