allow users from specific static ip

We already completed the site. The problem is The site is having 3 logins . one is the main super admin for the client another two is for college admin .(Colleges will login here) & their students. All the works are completed. For example: College IP: [login to view URL] [login to view URL] This college should not be able to login except from this IP. And there might be many college and each college can login only from there static ip. will it be possible. Thanks