It depends on the Tracking Mode setting under the Advanced tab in the rule properties.
The Tracking mode option determines how the rule handles connections. When it is set to share the rate limit and quota, the rule does not identify individual connections. Whether there is one computer traffic flowing through the rule or traffic from multiple computers, they have to compete for bandwidth and their individual usage is recorded as a whole. To limit individual connections, there are 4 options for setting the Tracking mode to do it: source IP address, source MAC address, destination IP address, and destination MAC address. These individual connections are called streams, and you will see them dynamically emerging in the list of rules.