i need block a proces using the ip address

[eluser]tnathos[/eluser]
Hi.. in my app i get the ip address from the user using $this->input->ip_address() but i have a dude..

if i need restrict an process, for example what my user only send a email in one day... and this user are in the enterprise computer... whit $this->input->ip_address() i restrict only this user or all pc the network enterprise?