PivotalHide.js

var hideShow = function(opts){

  var stories = document.querySelectorAll(".current .story");

  for(var i=0; i< stories.length; i++){
    if(opts.conditionType=="owner"){
      var owner = stories[i].querySelectorAll(".owner")[0];
      owner = owner == undefined ? "NONE" : owner.innerText;
      if(owner == opts.compare || opts.compare == "ALL"){
        stories[i].style.display = opts.display;
      }
      else{
        stories[i].style.display = opts.display == "none" ? "block" : "none";
      }
    }
  }

}

Usage.md

Show Only Your Stories

hideShow({conditionType:"owner", compare: "DISPLAY_NAME", display:"block"});