Group Promotion Quesiton.

Hi guys,

Just wanted to say that I love this product and the community and have learned a lot using the search function but ran into something I can seem to find an answer to.

Id like certain people within a "administrator" group to only be able to promote people to the "group ranks" "under" them. So I guess I only want them (the "administrator" group) to be able to promote/demote people within other specific groups, but never be able to promote themselves, or others,to a "higher" group than the the "administrator" group that they are in....if that makes any sense.

Is there any way to do that within the vanilla version Im using or would I need a plugin to do this?

Thanks