Feature request: include user instance tags with job

I've got a use case where, when launching jobs, I'd like to tag the instances that are used for that job with specific tags, ideally immediately upon instance launch.

For example, if submitting jobs to slurm, with the job names JOB_ONE and JOB_TWO, I would want to have the instances tagged jobname=JOB_ONE and jobname=JOB_TWO for costing purposes. Is there any way this could be done via parallelcluster at **instance launch time**? I can perform the tagging inside the job, but this then takes several minutes after the nodes are launched.