You can filter some, but not all list views. There are two different ways you can filter the lists.
The filter icon will show up in the column bar. Click on the filter icon will show a popup where you can type the text you want to filter on. The example below shows a Cluster->Monitor list.
If there are more options for a column, like adding columns, it will show as a downwards indicator. You can see this one in the Running tasks window.