Just adding a BeanQueryAdapter which will allow you to do this.

/**
 * Return true if this adapter is interested in queries for the given entity
 * type.
 */
public boolean isRegisterFor(Class<?> cls);

/**
 * Returns an int to to control the order in which BeanQueryAdapter are
 * executed when there is multiple of them registered for a given entity
 * type (class).
 */
public int getExecutionOrder();

/**
 * Modify the associated query prior to it being executed.
 */
public void preQuery(BeanQueryRequest<?> request);

So typically usage would be to register for any/all bean types that you want to adapt the queries for.

public void preQuery(BeanQueryRequest<?> request) {
	
  Query<?> query = request.getQuery();
	
  // can get the type of query Bean, List, RowCount, Id's etc
  //Type queryType = query.getType();
	
  // typically add extra predicates based on the current user
  // (probably get the current user from a TheadLocal)

  // ... for this example add a silly 1=1 predicate
  query.where().raw("1=1");
}

The code to implement this is in head.

Refer to com.avaje.ebean.event.BeanQueryAdapter