In order to print to a Social Work printer from your laptop, you will have to be on the network via ethernet or wireless. You will also need to be logged in as a member of the Administrators group.
Once you have configured a printer you must still choose it as your file's destination when printing. Any files you print will be sent to the printer you choose under an application's Print Setup, which is normally found under the File drop down menu.
If you also have a local printer connected to your PC, you may switch between the local printer and the NINJa printer at any time simply by changing the printer setting under the application's Print Setup dialog usually found under the File drop down menu.