Several photo-sharing services commonly allow artistic nude photography, but you should always follow each site’s current terms and visibility settings.

Based on the suggestions here:

• Flickr allows nude images if you set the photo’s safety level/restrictions appropriately. It also offers private groups and galleries if you want to limit viewing or comments.
• photo.net allows nudes in public galleries. Free accounts may have upload/gallery limits, while paid memberships offer more capacity.
• SmugMug was noted as allowing nude images in non-public galleries, which can be useful if you only want to share with selected viewers.

In short, if you want broad sharing with content controls, Flickr is a practical option; if you want a photography-focused community, photo.net may fit; if private access is the priority, a non-public gallery service such as SmugMug can work well.