For most of our plugins, the answer is no. Your computer must be connected to the internet when authorizing. Please do not purchase a license for a plugin that requires internet activation if your computer cannot connect to the internet.
For some of our newer plugins, like Presser and Put Me On Drums, there is an option to download a license file from your account, which can be used for offline authorization. However, most of our plugins are on a different system at this time which requires online activation.
If you are unsure if a plugin will work on your system, please submit a request here: https://waproduction.zendesk.com/hc/en-us/requests/new