By specifying LSF on the command line, STAR-CCM+ will automatically distribute a worker process to each LSF node allocated to the job.
Submit the job to the batch management system, specifying the number of resource nodes to use (\ indicates a line continuation):
% bsub -q <LSF queue> -n <number of processes> \
/install_path/star4/bin/starccm+ -batchsystem lsf \
-batch <macro file>
To see how the job is progressing:
% bjobs