I would like the option to search only local communities

**Is your feature request related to a problem? Please describe.**
Currently, the search feature searches all federated communities.

**Describe the solution you'd like**
I would like to have a way to search only local communities in the times when I only care about local community search results.

**Describe alternatives you've considered**
Currently, the only way to search local communities is on the web version.

**Additional context**
Maybe there could be a toggle in the search screen that allows you to switch between only local communities, and all federated communities, or some sort of filter that only gives up local communities as a result.