You can run CoAction/Katana from a different location but you will need to download a software that allows you to remotely access your server computer. You will need to download a software on your server and other computer and leave the server on so you can access it.
Here are a couple of suggestions, although you may find another that works for you:
- Teamviewer http://www.teamviewer.com/en/index.aspx
- Logmein https://secure.logmeinrescue.com/