Yes, all of the level-specific tokens, like <smallBlind>, <bigBlind>, <ante>, <gameName>, etc, support the attribute round. round can be an absolute round number, like 3, or if you prefix it with a + or -, it becomes an offset from the current round.
For example, to get the big blind of the last round: <bigBlind round="-1">
For the small blind of the next round: <smallBlind round="+1">
For the ante of round 6: <ante round="6">