When you add a job to the render queue, the Network Wizard panel pops up to help you configure the type of job you are submitting and its settings.
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Selecting the job type on the Network Wizard
Job Types
First you have to choose between four different job types:
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On Animation jobs, you can also specify the frame range to be rendered.
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Choosing the scene file to render and its settings
Nodes
You can even choose which node(s) will work on each specific job. Enabling the "Use any render node available" makes Maxwell to assign the job to the first node that it finds available on the network.
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Choosing the nodes to work on an specific job