applying tenant specific schema changes

It can handle a scenario like that using what are called changelog parameters. Doing it ‘synchronously’ is not possible out of the box.

The company I work for (Datical) does have tooling that might meet your needs. 

Steve Donie
Principal Software Engineer
Datical, Inc.

Does liquibase support applying tenant specific schemas (shared database/multiple schemas) synchronously using some extension or out of box?