THREE.js LineSegments with multimaterial support

Question

In my project I am creating LineSegments (LineMesh) with modified geometry (changing the vertex positions) from another mesh and with MeshBasicMaterialwith black color.Adding the LineMesh to the already existing Mesh. Everything works fine. But now I want to hide particular part of the mesh by setting visible property to false by taking the materialIndex from the faces of geometry.But in this, the previously created mesh is hiding but LineMesh added to it is not hiding. Is it possible to hide particular part of LineMesh and also wanted to know whether LineMesh will support MultiMaterial.So that it will be easy for me to apply visibility, transparent property to particular part of Mesh.

var mesh, renderer, scene, camera, materials;

init();
animate();

function init() {

// renderer
renderer = new THREE.WebGLRenderer();
renderer.setSize( window.innerWidth, window.innerHeight );
document.body.appendChild( renderer.domElement );

// scene
scene = new THREE.Scene();

// camera
camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
camera.position.z = 300;
camera.lookAt( scene.position );

// directional
var light = new THREE.DirectionalLight( 0xffffff );
light.position.set( 1, 1, 1 );
scene.add( light );

// ambient
var ambient = new THREE.AmbientLight( 0x222222 );
scene.add( ambient );

// geometry
var geometry = new THREE.BoxGeometry( 100, 100, 100, 4, 4, 4 );

// materials
materials = [
    new THREE.MeshLambertMaterial( { color: 0xffff00, side: THREE.DoubleSide } ),
    new THREE.MeshBasicMaterial( { color: 0x00ffff, side: THREE.DoubleSide } )
];

// assign material to each face
for( var i = 0; i < geometry.faces.length; i++ ) {
    geometry.faces[ i ].materialIndex = THREE.Math.randInt( 0, 1 );
}
geometry.sortFacesByMaterialIndex(); // optional, to reduce draw calls

// mesh
mesh = new THREE.Mesh( geometry, materials );
scene.add( mesh );

mat = new THREE.LineBasicMaterial({color: 0x000000});
mesh2= new THREE.LineSegments(geometry, mat);
mesh.add(mesh2);

}

function animate() {

requestAnimationFrame( animate );

mesh.rotation.x += 0.01;
mesh.rotation.y += 0.02;
mesh.rotation.z += 0.03;

renderer.render( scene, camera );

}

This below code is not to be working for LineSegments

mesh2= new THREE.LineSegments(geometry, new THREE.MultiMaterial(materials));