user20936: Which IP do I have to fill in in mSIGNA to connect to the Bitcoin Network without using the BitcoinQt/bitcoind application?
Is it possible to use mSIGNA and BitcoinQt even if the syncing process is not finished yet?

user26966: Yes there is a way, you need a way to connect to someone running BitcoinQT and who has made their node public. BitcoinQT runs as a node, but to make it discoverable to any but other BitcoinQT wallet users you have to go a step further. 
So you need a list of such BitcoinQT "servers", and I found one earlier and in searching for that list of open Bitcoin-QT "servers" someone had published I found this. 
If I manage to find it again, I am trying to solve my problem with sending from mSIGNA, I will post a link and more complete answer here.

user6256: mSIGNA can connect to any bitcoin node that is publicly available online.  There is a list of nodes that can currently be reached online from Bitnodes.  The IP address of any public node can be specified by following the instruction from the mSIGNA Getting Started Guide is excerpted below:

If you  would   prefer  to  connect to  a   remote  bitcoin node,   you can change
  the IP  address and port    under   Network->Settings…(File->Preferences
  …   on  Mac).
NOTE:  mSIGNA™ only    connects    via the peer-to-peer    protocol    and does not    require any special RPC access  to  other   nodes.


20936: <p>Which IP do I have to fill in in mSIGNA to connect to the Bitcoin Network without using the BitcoinQt/bitcoind application?</p>

<p>Is it possible to use mSIGNA and BitcoinQt even if the syncing process is not finished yet?</p>
 26966: <p>Yes there is a way, you need a way to connect to someone running BitcoinQT and who has made their node public. BitcoinQT runs as a node, but to make it discoverable to any but other BitcoinQT wallet users you have to go a step further. </p>

<p>So you need a list of such BitcoinQT "servers", and I found one earlier and in searching for that list of open Bitcoin-QT "servers" someone had published I found this. </p>

<p>If I manage to find it again, I am trying to solve my problem with sending from mSIGNA, I will post a link and more complete answer here.</p>
 6256: <p>mSIGNA can connect to any bitcoin node that is publicly available online.  There is a list of nodes that can currently be reached online from <a href="https://bitnodes.21.co/" rel="nofollow">Bitnodes</a>.  The IP address of any public node can be specified by following the instruction from the <a href="https://ciphrex.com/docs/mSIGNA-Getting_Started.pdf" rel="nofollow">mSIGNA Getting Started Guide</a> is excerpted below:</p>

<blockquote>
  <p>If you  would   prefer  to  connect to  a   remote  bitcoin node,   you can change<br>
  the IP  address and port    under   Network->Settings…(File->Preferences<br>
  …   on  Mac).</p>
  
  <p>NOTE:  mSIGNA™ only    connects    via the peer-to-peer    protocol    and does not    require any special RPC access  to  other   nodes.</p>
</blockquote>
