Yes.
Assuming here that pw-id is the same for all neighbors, your template should look something like this:
<vfi>
<name>{/vfi-name}</name>
<neighbor>
<address>{/neighbors}</address>
<pw-id>{string(/pw-id)}</pw-id>
</neighbor>
</vfi>
admin@ncs(config-foo-bar)# commit dry-run outformat native
native {
device {
name xr-00
data l2vpn
bridge group 12
bridge-domain 23
vfi ttt
neighbor 1.1.1.1 pw-id 4444
exit
neighbor 2.2.2.2 pw-id 4444
exit
exit
exit
exit
exit
}
}
I assumed that everything is directly under the service so I didn't add the dots you've added, but depending on the context you'd have, you might need to change that.
But anyhow, the context in a service XML template is a bit tricky, but the bottom line is that if you have some properties taken from a list or leaf-list in your service model, and you assign those to another list in your device model, and you also need to fetch inputs from outside the source list (in this example, pw-id), you'd usually wrap those (and only those) in the xpath string() method, as it doesn't affect the context.
You can usually use 'commit dry-run | debug template' to track the context, but in the case of a leaf-list it won't be as helpful as in the case of a proper list - but still something to keep in mind...
