No.

In strict Jainism, there is no rule that eternally forbids two souls from meeting in a heavenly realm after human life.

But the strict Jain understanding is this:

• “Heaven” in Jainism is a deva-loka, not liberation.
• Souls go there only according to karma.
• A soul that has committed sexual misconduct may bind severe karma, which can prevent a heavenly rebirth or cause a lower rebirth.
• Even in deva-loka, souls do not have worldly sexual relations like humans.

So the strict answer is:

No, Jainism does not teach an absolute prohibition on souls meeting after human life; but sexual misconduct can block or worsen the rebirth, and heavenly realms are not places for human-like relationships.