You should flag the question as in need of moderator intervention.
Moderators are able to migrate suitable questions to any destination.
The belongs on another site close/flag shortcut exists for common destinations where migrating users on the source site are likely to be familiar with the on-topic rules for the proposed destination (no one wants to migrate rubbish or off topic questions).
I doubt there are enough Database Administrators questions that truly belong on Information Security to make the need common enough. (I'm not sure how many Database Administrators users would be familiar enough with the on-topic rules for Information Security either).
There might be a case for adding a shortcut for more common target sites that Database Administrators users are familiar with (perhaps Super User and Server Fault), but the current migration metrics (moderator tools privilege required) for the past 90 days indicate that only one question was migrated from Database Administrators to Server Fault (total migrations: 69 to SO, 1 to SF, nothing else).
Perhaps we need to get better at flagging for moderator intervention in these types of cases, so the metrics better reflect the reality. It may also be that the reality is that we get very, very few questions that ought to be migrated to a site other than Stack Overflow.