In Jain Dharma there is no canonical or scriptural rule that prescribes a gender-based difference in tilak (forehead mark). Tilak marks are not a required Jain practice, and Jain ongoing rituals focus more on inner conduct (samyak-darshana, samyak-charitra) than external marks.

What you might see in practice:

• Some Jain households or individuals may use simple marks (like sandalwood paste) or avoid marks altogether. This is more a matter of personal or cultural preference, not a religious requirement.
• The key distinction in Jainism is between Digambar and Shwetambar practices in certain robes, vows, and rituals, not in a mandated gender-specific tilak.
• Monastic life (especially in Digambar tradition) emphasizes renunciation of adornments, so forehead marks are not part of their renunciatory practice. Lay followers may adopt any mark or none based on local custom.

If you’re looking for precise guidance from Jain scriptures or tradition, tell me what specific context (a ceremony, daily practice, or a regional custom) you have in mind, and I’ll explain it within the Jain framework.