Maybe LMS is getting conflated with NCM, which is more vendor-neutral and does appear to support certain Dell PowerConnect devices? The name "Network Compliance Manager" notwithstanding, device configuration management is one of its main features:
http://www.cisco.com/en/US/products/ps6923/index.html
http://www.cisco.com/en/US/prod/collateral/netmgtsw/ps6911/ps6923/data_sheet_c78-658607.html
"Change and configure: Includes creating and deploying configuration changes in a structured manner, such as using configuration templates or scripts, peer reviewing and approving proposed changes, and maintaining an archive of previous configurations."
As far as LMS itself, if v4.x still doesn't do much with third-party devices, as described here
https://supportforums.cisco.com/thread/2081876, I'd think v3.2 probably isn't going to surprise either.