1ef7220f__Guide___Salesforce_Developers__Details
[Field] NetworkScope [Details] 
Type picklist Properties Group, Nillable, Restricted picklist, Sort Description Specifies whether this feed item is available in the default community, a specific community, or all communities. This field is available in API version 26.0 and later, if Salesforce Communities is enabled for your organization. NetworkScope can have the following values: NetworkId—The ID of the community in which the FeedItem is available. If left empty, the feed item is only available in the default community. AllNetworks—The feed item is available in all communities. Note the following exceptions for NetworkScope: Only feed items with a Group or User parent can set a NetworkId or a null value for NetworkScope. For feed items with a record parent, users can set NetworkScope only to AllNetworks. You can’t filter a FeedItem on the NetworkScope field.
UserFeed | SOAP API Developer's Guide | Salesforce Developers
Details