This just worked for me.
Current Layer is 0...
Command:
Command: -la
-LAYER
Current layer: "0"
Enter an option
[?/Make/Set/New/ON/OFF/Color/Ltype/LWeight/Plot/Freeze/Thaw/LOck/Unlock/stAte]:
f
Enter name list of layer(s) to freeze or <select objects>: *demo*
Enter an option
current layers
__DEMO
Demo
demo-one
three_demo
twodemo