IP QoS－Control Bandwidth Reasonably
Among the wireless network, indiscriminate Internet surfing and bandwidth-guzzling downloads by internal users often leave home or small office with insufficient bandwidth. TL-WR841N supports IP QoS function, allowing optimum utilization of bandwidth and offers bandwidth control over congestion, preventing the bandwidth abuse. In this way, the users of a small network receive committed and specific bandwidth, preventing non-critical applications from degrading network performance.
Seems like your router can have QOS for each ip. You need to read the manual for specifics.