Hi,
As i know there is no such feature. But it would be useful especially for some large scaled projects which has large gallery voids. Using room seperator is not practical enough since i have to allign them everytime i update railings. (Locking room seperators to railings may be a solution but it may couse some other problems) It would be great if there was a feature in railings edit type menu which will give the option to add room boundry for desired element of railings. I hope autodesk team will consider this for the new versions.
Thanks.