In this release of Integration Insight in Oracle Integration, you can only search for model instances by identifier values. For example, if you have modeled a Help Desk application, and used Incident ID as the identifier for the model, you would be able to search for a single Help Desk engagement by Incident ID.
It is worth noting that you can also filter a list of instances by criteria beyond just the identifier, and this can be helpful in finding instances. Any indicator that is marked as filterable in the model is available to use as filter criteria when viewing an instance list. See Filter Dashboards.