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Sitefinity Desktop Application tries to comply as much as possible with the Sitefinity permissions. You can create users with author or editor roles for example in Sitefinity and their permissions will be respected in Sitefinity Desktop Application as well.
I hope this information is useful.
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items