local network only

How to allow BI web gui access to a particular local ip address? My mother ask for access for his desktop. If I unblock it then everyone in my network can access it. tnx

Hello everyone, this is my first question, so if I didn't do something correctly, please tell me. I have HikVision NVR DS-96128NI-I16, decoder DS-6912UID and 4 displays. In the NVR there is 86 cameras. In the decoder I configure the displays with HDMI. Because NVR and decoder are in the same...