Here is a script:
/ip firewall address-list
add address=192.168.2.247 list=Phalla-List
add address=192.168.2.250 list=Phalla-List
/ip firewall mangle
add action=mark-connection chain=forward comment=Phalla connection-state=new \
new-connection-mark=Phalla-conn src-address-list=Phalla-List
add action=mark-packet chain=forward connection-mark=Phalla-conn \
new-packet-mark=Phalla-conn passthrough=no
add action=mark-connection chain=forward comment=Other connection-state=new \
new-connection-mark=Other-conn src-address-list=!Phalla-List
add action=mark-packet chain=forward connection-mark=Other-conn \
new-packet-mark=Other-conn passthrough=no
/queue simple
add max-limit=2M/2M name=LAN-All priority=1/1 target=bridge-Local
add max-limit=1M/1M name=Phalla packet-marks=Phalla-conn parent=LAN-All \
target=""
add max-limit=2M/2M name=Other packet-marks=Other-conn parent=LAN-All \
priority=1/1 target=""
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