Dan, nothing like this is currently possible in galaxy-central. Builds are handled very statically right now, just read at startup into a variable in Galaxy util, which is then used in lots of places. To implement this would require replacing all those accesses with a "get_builds" that would filter by user. Additional complication comes from all the dynamic selects that work on builds (e.g. mapping tools) that would need to be adjusted. So, this would be pretty non-trivial. The additional abstraction would definitely be a good thing if someone were to implement it, but it isn't on our list at the moment. On Jan 14, 2011, at 8:15 AM, Dan MacLean (TSL) wrote: -- jt James Taylor, Assistant Professor, Biology / Computer Science, Emory University