Remove 255-character IP Address Restriction

There is a 255-character limit to enter IP addresses if I want to restrict the view by IP address, which isn't enough space to enter all my employees' IP addresses. Can you configure this so that I only need to input the first three 8-bit fields of the IP address? This way, all workers on my network will automatically have access. For example, entering the IP address like this "192.168.142." or "192.168.142.0/255" will allow all devices (PCs) on my network to access the site.