Simple case: single governance token
Add an ERC-20 gate on the governance token with a minimum balance. Done.
Delegated votes
If your DAO uses delegation, gate on delegate registration events instead of raw balance. Requires custom logic — IRLEvents supports allowlist gates for this.
Multi-token DAOs
Some DAOs have both a governance token and a "membership" NFT. Use AND logic (both) or OR logic (either), depending on your gate philosophy.