A PlayerAttachment controling the maximum amount of units that are allowed in a owned or friendly territory during a movement phase.
Value must start with either
"owned", (only counting units owned by the attached player)
"allied", (counting units owned by the attached players allies)
or "total", (which counts enemy units too)
then after that is a colon delimited list of units or the word "all"
and then a count equal to the maximum number of units allowed in a territory.
<option name="movementLimit" value="owned:Battleship:Battlecruiser:Cruiser:Destroyer:Submarine:Transport" count="4"/>
You may have multiple instances of this, per player.
It only affects normal movement.