CrashPlan - How do I exclude my "hotspot" or a network so it doesn't get used for backup access?

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You can prevent the Code42 CrashPlan application from backing up over specified network adapters and wireless networks.

For example, this is useful if you want to prevent the CrashPlan application from:

Backing up through a cellular hotspot that could result in overage charges from your Cellular provider.
Backing up over a DSL network connection causing slow or stalled Internet access.

The following tutorial from Code42 provides a step-by-step guide to excluding network adapters and wireless networks.