If it is possible somehow, rly sorry, I haven't found a way.
Use case: link one element of origin with multiple target elements
Workflow:
1. Enable linking element tool
2. Click on source element
3. repeat: ALT+Click on n destination elements (ALT pressed while clicking automatically sets next link source)
Result:
links created between source and each of n destination elements (1:N mapping) as long as there are available respective in/out links