Interoperability allows for Creative Finishing applications, on the same or on different workstations, to share clips and sequences (timelines).
To obtain a sequence, the Lustre artist simply browses the remote project's project folders, and drags and drops the Smoke/Flame sequence to the Lustre Storyboard. Grading proceeds as usual. Once done, Lustre renders its results back to the project's defined render destination (i.e Lustre Shared Library or any location on the Media List). Within the context of Source Grading, this process leaves all Timeline FX, transitions and metadata intact.
Conceptually, this is the simplest scenario. However, the interoperability features give you a high level of flexibility, whereas you can send your sequence to and back from any of the Creative Finishing applications at any point of the finishing process.