Submitting multiple WRF jobs at once

[Yiannis]

I would like to know whether there is a way to submit more than one WRF runs with different namelists options for instance (e.g. if I run the model on the cluster) using some particular option in WRF.
Of course the same could be done by copying the original run directory to create multiple case directories and running each model case from its own directory.
Thanks you!