Yes. You could make a plugin, make an alias, or simply add kick command it to the end of your console command.
Plugin example:
PHP Code:
public void OnMapEnd()
{
for (int i = 1; i <= MaxClients; i++)
{
if (!IsClientInGame(i)) continue;
KickClient(i, "Goodbye");
}
}
Alias example:
Server.cfg: alias "changemap" "sm_kick @all;changelevel"
Usage: changemap de_dust2
Command Example:
sm_map de_dust2;sm_kick @all