Current problem
When you search "from:" in a community, it does not give any suggestions.
Proposed change
When you search "from:" in a community, it suggests users that have recently sent messages in the currently open channel.
Additional information
Discord does this.
Somewhat similar to https://feedback.fluxer.com/p/4022/sort-mentions-list-by-recent-activity-after-typing-first-par, could be done at the same time.