Short answer - Yes! To display content from only certain campaigns, simply click the funnel-shaped icon on the top right corner of your dashboard. This will open up a list of all of your campaigns and allow you to select or deselect campaigns to display in your dashboard. Once you have selected the campaigns you want to display, click "Apply" and Lately will only show you information, posts and data for those campaigns you selected. This is reflected everywhere in your dashboard!
When you are ready to once again display your content for all of your campaigns, simply click on the funnel icon again and click "Clear". Now all of your content will be displayed in your dashboard!