Hi mrenneke -
While I do not think the implementation will be fully complete as of the launcher version of 4.11, you can test this feature via the Github version as this commit:
https://github.com/EpicGames/UnrealEngine/commit/f89256dd0efb7d0b1427729a8f8a6007
Runs a lighting build for specific, or all, map(s). Reusing the ResavePackages commandlet. The commandline for the commandlet is:
ProjectName -run=resavepackages -buildlighting -allowcommandletrendering -map=optionalmapname
Script added to UAT to automate the process. The commandline for this is:
RebuildLightmaps -project=“My:/Absolute/Project/Path.uproject” -MapsToRebuildLightMaps=OptionalMapName
Thank You