threejs 特定のスプライトを管理

https://threejs.org/examples/#canvas_lines
を元に改変したいのですが、

スプライトを100個生成していますが、
特定のスプライトのみをいじくることは可能でしょうか？
例えば、idなどを振って、あとからクリックしたり色を変えたりというのを
特定の要素だけに適用したいと思っています。

<!DOCTYPE html>
<html lang="en">
	<head>
		<title>three.js canvas - lines - random</title>
		<meta charset="utf-8">
		<meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0">
		<style>
			body {
				background-color: #000000;
				margin: 0px;
				overflow: hidden;
			}
			a {
				color:#0078ff;
			}
		</style>
	</head>
	<body>

		<script src="../build/three.js"></script>

		<script src="js/renderers/Projector.js"></script>
		<script src="js/renderers/CanvasRenderer.js"></script>

		<script>
			var mouseX = 0, mouseY = 0,
			windowHalfX = window.innerWidth / 2,
			windowHalfY = window.innerHeight / 2,
			camera, scene, renderer;
			init();
			animate();
			function init() {
				var container = document.createElement('div');
				document.body.appendChild(container);
				camera = new THREE.PerspectiveCamera( 75, window.innerWidth / window.innerHeight, 1, 10000 );
				camera.position.z = 100;
				scene = new THREE.Scene();
				renderer = new THREE.CanvasRenderer();
				renderer.setPixelRatio( window.devicePixelRatio );
				renderer.setSize( window.innerWidth, window.innerHeight );
				container.appendChild( renderer.domElement );
				// particles
				var PI2 = Math.PI * 2;
				var material = new THREE.SpriteCanvasMaterial( {
					color: 0xffffff,
					program: function ( context ) {
						context.beginPath();
						context.arc( 0, 0, 0.5, 0, PI2, true );
						context.fill();
					}
				} );
				var points = [];
				for ( var i = 0; i < 100; i ++ ) {
					var particle = new THREE.Sprite( material );
					particle.position.x = Math.random() * 2 - 1;
					particle.position.y = Math.random() * 2 - 1;
					particle.position.z = Math.random() * 2 - 1;
					particle.position.normalize();
					particle.position.multiplyScalar( Math.random() * 10 + 450 );
					particle.scale.x = particle.scale.y = 10;
					scene.add( particle );
					points.push( particle.position );
				}
				// lines
				var geometry = new THREE.BufferGeometry().setFromPoints( points );
				var line = new THREE.Line( geometry, new THREE.LineBasicMaterial( { color: 0xffffff, opacity: 0.5 } ) );
				scene.add( line );
				document.addEventListener( 'mousemove', onDocumentMouseMove, false );
				document.addEventListener( 'touchstart', onDocumentTouchStart, false );
				document.addEventListener( 'touchmove', onDocumentTouchMove, false );
				//
				window.addEventListener( 'resize', onWindowResize, false );
			}
			function onWindowResize() {
				windowHalfX = window.innerWidth / 2;
				windowHalfY = window.innerHeight / 2;
				camera.aspect = window.innerWidth / window.innerHeight;
				camera.updateProjectionMatrix();
				renderer.setSize( window.innerWidth, window.innerHeight );
			}
			//
			function onDocumentMouseMove(event) {
				mouseX = event.clientX - windowHalfX;
				mouseY = event.clientY - windowHalfY;
			}
			function onDocumentTouchStart( event ) {
				if ( event.touches.length > 1 ) {
					event.preventDefault();
					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}
			function onDocumentTouchMove( event ) {
				if ( event.touches.length == 1 ) {
					event.preventDefault();
					mouseX = event.touches[ 0 ].pageX - windowHalfX;
					mouseY = event.touches[ 0 ].pageY - windowHalfY;
				}
			}
			//
			function animate() {
				requestAnimationFrame( animate );
				render();
			}
			function render() {
				camera.position.x += ( mouseX - camera.position.x ) * .05;
				camera.position.y += ( - mouseY + 200 - camera.position.y ) * .05;
				camera.lookAt( scene.position );
				renderer.render( scene, camera );
			}
		</script>
	</body>
</html>