Customizing SimpleWebrtc

Question

I'm using simplewebrtc for my webrtc project.

1. Is there anyway I can mute another person's audio whenever I want and unmute it?

2. Is there anyway I can get the stream of a particular user in a room and not of the rest in the same room?

   window.onload = function(){
   
           var room = "2";
   
   
           // Create webrtc connection
           var webrtc = new SimpleWebRTC({
               localVideoEl: 'publisher',
               remoteVideosEl: '',
               autoRequestMedia: true,
               log: true,
               debug: false,
               detectSpeakingEvents: true,
               autoAdjustMic: false
           });
   
   
           // we did not get access to the camera
           webrtc.on('localMediaError', function (err) {
           });
   
   
           // a peer video has been added
           webrtc.on('videoAdded', function (video, peer) {
               console.log('video added', peer);
   
               var remotes = document.getElementById('subscriber');
   
               if (remotes) {
                   var container = document.createElement('div');
                   container.className = 'videoContainer';
                   container.setAttribute('data-user', userType);
                   // $div.attr('data-user', streamUser.userType);
                   container.setAttribute('class', 'col-md-6 each-video'); 
                   container.id = 'container_' + webrtc.getDomId(peer);
                   container.appendChild(video);
   
                   remotes.appendChild(container);
   
   
               }
           });
   
           // a peer video has been removed
   
           // a peer video was removed
           webrtc.on('videoRemoved', function (video, peer) {
               console.log('video removed ', peer);
               var remotes = document.getElementById('subscriber');
               var el = document.getElementById(peer ? 'container_' + webrtc.getDomId(peer) : 'localScreenContainer');
               if (remotes && el) {
                   remotes.removeChild(el);
               }
           });
   
   
   
           // when it's ready and we have a room from url, join the call
           webrtc.on('readyToCall', function(){
               if(room) webrtc.joinRoom(room);
           });
   
   
           if(room){
               webrtc.createRoom(room, function(err, name){
                       if(err){
                           console.log(err);
                       }
                   });
           }
   
   
   
            }
   

I didn't find anything for my questions in their documentation. If it's possible, then it would be great!