A ranger having the Battlefield Archer PP can use this power:
Battlefield Experience (11th level): You can designate more than one creature as your quarry at a time, up to a number equal to your Wisdom modifier. In addition, any attack made against a quarry receives a +1 bonus to attack rolls.
A ranger with the Hunter's Quarry class feature can, once per turn as a minor action, designate the nearest visible enemy as his or her quarry. This designation lasts until the encounter ends, the quarry is defeated, or the ranger designates a different target. Once per round, the ranger deals 1d6 per tier damage when hitting his or her quarry with an attack.
Let's say we have 3 enemies at different locations. Would you need to move through the battlefield until your first target is the nearest and then continue doing so until every enemy is marked? Once they are marked by your Quarry, do you no longer need them to be the nearest to benefit, once per round, of your bonus to damage?
English isn't my first language, so I can try to reformulate if necessary.