yes, that’s possible. It requires modifying the UnrealBuildTool source. What i’ve done to allow Multi-User Application Support is to modify ManifestGenerator.cs located in **Engine\Source\Programs\UnrealBuildTool\Platform\UWP. **Specifically, you want to go inside the method GetProperties() and add:
//RICH: Added By Richard For Multi-User Applications.
XmlElement PackageSupportedUsers = AppxManifestXmlDocument.CreateElement("uap", "SupportedUsers", "http://schemas.microsoft.com/appx/manifest/uap/windows10");
string SupportedUsers;
GameIni.GetString("/Script/EngineSettings.GeneralProjectSettings", "SupportedUsers", out SupportedUsers);
if (SupportedUsers.Length == 0)
PackageSupportedUsers.InnerText = "single";
else
PackageSupportedUsers.InnerText = SupportedUsers;
Properties.AppendChild(PackageSupportedUsers);
That code allows you to have
[/Script/EngineSettings.GeneralProjectSettings]
SupportedUsers=multiple
In any of your XXXGame.ini config files (eg DefaultGame.ini, UWPGame.ini, etc)