The familiar MLINE command of AutoCAD is not yet available in Bricscad natively. However, what is unknown to many is that this command is available to Bricscad users via a small FREEware add-on called BCadTools from Bricsys itself. Created by Bricsys veteran programmer Torsten Moses, BCadTools has a bunch of other tools useful to enhance general productivity in Bricscad. But the implementation of MLINE as a custom BRX entity in BCadTools is one that I think is most useful and important to many CAD users.
The MLINE command implementation looks very good - complete with multi-line styles and all other settings. Those of you who are missing the MLINE command in Bricsad can download BCadTools and give it a try. Other tools of interest are those related to attribute management and layer management.