Add tags to members (e.g. "staff", "founding") and create discount codes that only apply to tagged members.
Open a member's profile and use the Tags card. Type a tag and press Enter or Add. Tags are lowercased and de-duplicated automatically. Remove one with the × on the chip.
Go to Settings → Discount Codes (or the Discount Codes page). When creating a code, set the "member tag" field to the tag you want it limited to.
When a tagged member checks out, a matching tag discount is auto-applied. Members can also type a code manually at checkout if you share one.