LSF project is created through job submission, bsub -P, project is directly associated with job rather user.
But you may map project to user group, e.g. use bsub -G to submit job. Here are two doc links for LSF user group configuration and bugroup command.
https://www.ibm.com/docs/en/spectrum-lsf/10.1.0?topic=files-lsbusers
https://www.ibm.com/docs/en/spectrum-lsf/10.1.0?topic=reference-bugroup