I have created a list of using the CreatorNames property. I need to know how to filter posts by the Creator now.

Here is my code below I currently have. How would I finish this.  Thanks in advance. I am attempting to create a query string but of course it does not work because I don't know how I am supposed to get the nodes once the creator is selected. Thanks

  <ul>
      @foreach(dynamic node in @Model.NodeById(1089).Descendants("ScienceResearchUpdatesPost").OrderBy("CreatorName"))
      {
        if (creatorList != node.CreatorName)
        {
          <li><a href="@baseNode.Url?author=@node.CreatorName">@node.CreatorName</a></li>    
        }
        creatorList = node.CreatorName;
      }
     </ul>
    
  }