Yes. If you already have Jeppesen coverage purchased through the ForeFlight website, you can also link a Jeppesen account to your ForeFlight account and select the coverage to activate on that device. You need one seat (license) per device in which you want to use that coverage in ForeFlight Mobile. The Jeppesen coverage on that device will then be the combination of the coverage purchased through ForeFlight and activated from the linked Jeppesen account.
If you don't have a Jeppesen subscription that was purchased through ForeFlight, you can link a Jeppesen account, including trip kit coverage purchased directly from Jeppesen, to your ForeFlight account. The trip kit is only valid for the time period specified when you purchased it, and you need one seat (license) per device in which you want to use that coverage in ForeFlight Mobile.
See How do I link and activate my Jeppesen subscription in ForeFlight Mobile? for detailed steps.