Multiple groups

Is it possible to have multiple groups for a host ? 

Something like: 

```
[[tunnels]]
name = "host1"
host = "host1"
local = 8000
remote = "localhost:80"
group = "grp1"

[[tunnels]]
name = "host2"
host = "host02"
local = 8001
remote = "localhost:80"
group = "grp2"

[[tunnels]]
name = "host3"
host = "host3"
local = 8002
remote = "localhost:80"
group = "grp1,grp2"
```