why i can't attribute a panel to a specific desktop? and why i can't give a name to a panel? , because attribute a panel to a specific desktop will help to more orgenize the workspace (each panel will contain specific applications according to the interest of a workspace).
Enlightement 17 is advantageous in this point but the probleme is that i can't give a name to the panel (in consequence I don't know which panel I attributed to a workspace).
In this momment it is the only problem what i have with KDE woekspace.

Not better makes task-manager icons activity aware?