input->ip_address() not returning full ip address

[eluser]jeffpeck[/eluser]
If my ip address is "10.99.100.1, 123.123.123.123", CodeIgniter's Input->ip_address() function will actually parse this down to "123.123.123.123"

What this means is if there are 100 users all sharing one IP address because they using the same internet connection (i.e. on a router), they have no identity from one-another in situations of gathering statistics and other applications.

Is there a reason that CI purposely does this? Is this discussed somewhere on this forum?

Thanks.