Yes. Founders admitted to the Full-Time Accelerator are expected to be fully committed to building the company they apply with for the duration of the program. In practice, this means founders are not simultaneously employed elsewhere, leading other companies, or significantly involved in side ventures or initiatives.
Teams in which one or more founders are part-time, employed outside the company, or actively working on other ventures are unlikely to be admitted, unless they can demonstrate that their company is already executing in roughly the top 10% of their space. In these cases, the application should clearly show exceptional progress and traction (for example, revenue growth, user adoption, technology milestones, or market leadership relative to peers).