It depends on the temple. The two main Jain sects you’ll hear about are Digambar and Shwetambar, and many temples belong to one of these, while some have separate shrines for both.

How to tell quickly:

• Idol attire: In Digambar temples, Tirthankaras are traditionally represented nude (no clothes). In Shwetambar temples, the idols are clothed.
• Monastic order clues: Digambar temples may show practices and iconography associated with the Digambar lineage; Shwetambar temples with Shwetambar traditions.
• Separate halls: Some larger centers have separate shrines for Digambar and Shwetambar idols, or have sections dedicated to each.

If you tell me the temple’s name and city, I can give a more precise answer about which sect it corresponds to.