Can I transfer a asset store license?

If I work on a commercial project for a company and I need an editor plugin from the Asset Store, it is bound to my account. If I leave the company, the company would want to transfer this plugin it paid for to someone else and would prohibit future use by me. So how is this manageable?

No it is not possible to transfer assets, specifically editor extensions.

Appendix 1 Clause 2.2: …the END-USERS shall not be entitled to distribute or transfer in any way…