Devices and methods are provided that spatially restrict online communications to persons from a real world meeting. Such restriction, with optional supervisory control by an authority, protects children from online predators, and can facilitate communication with known friends. An embodiment provides a portable access control (AC) device having a spatially-restricted (SR) communication port that communicates over a short range. The AC device has a unique identifier (UID) that identifies the AC device and the owner of the AC device. The user collects UIDs (using the SR port) from other people having AC devices, and stores the collected UIDs in a friendlist. When communicating by Internet, discrimination software restricts communication from people who do not have UIDs in the friendlist. The discrimination software can operate on a user's computer or on a remote server. Embodiments provide protected email, instant messaging, voice communication, gaming activities, and video links.